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NR547 EXAM / ACTUAL NR547
DIFFERENTIAL DIAGNOSIS IN PSYCHIATRIC
MENTAL HEALTH ACROSS THE LIFESPAN
LATEST EXAM 2026/2027 ACCURATE EXAM
REAL QUESTIONS AND CORRECT DETAILED
ANSWERS (100% CORRECT VERIFIED
SOLUTIONS) LATEST UPDATED VERSION
|GUARANTEED PASS A+
Question 1
A 7-year-old boy is brought to clinic because his teacher
reports he cannot sit still, interrupts others, and fails to finish
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assignments. Symptoms began at age 5 and occur both at
school and home. Which diagnosis is most likely?
A) Oppositional Defiant Disorder
B) Autism Spectrum Disorder
C) ADHD, Combined Presentation
D) Generalized Anxiety Disorder
Correct Answer: C
Rationale: ADHD Combined Presentation requires 6+
inattentive and 6+ hyperactive-impulsive symptoms (DSM-5-
TR). Symptoms before age 12, present in ≥2 settings, with
functional impairment.
Question 2
A 15-year-old female reports sad mood, weight loss, insomnia,
and loss of interest in soccer for 3 weeks. No prior episodes.
Her parents divorced 2 months ago. Best initial diagnosis?
A) Major Depressive Disorder, single episode
B) Adjustment Disorder with depressed mood
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C) Persistent Depressive Disorder
D) Bereavement
Correct Answer: A
Rationale: Symptoms meet MDD criteria (≥5 symptoms
including depressed mood and anhedonia, ≥2 weeks).
Adjustment Disorder is considered if symptoms are less than full
criteria, but here full MDD is present.
Question 3
An 8-year-old girl has severe temper outbursts 3–4 times
weekly for 18 months. Between outbursts, she is irritable and
angry most of the day. She is age 8. What is the best
diagnosis?
A) Bipolar I Disorder
B) Oppositional Defiant Disorder
C) Disruptive Mood Dysregulation Disorder
D) Intermittent Explosive Disorder
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Correct Answer: C
Rationale: DMDD requires onset before age 10, persistent
irritability between outbursts, and outbursts ≥3 times/week for
≥12 months. Age 6–18.
Question 4
A 6-year-old boy refuses to separate from his mother to
attend school. He has nightmares about harm befalling her
and physical complaints on school days. Duration 5 months.
Diagnosis?
A) School phobia
B) Separation Anxiety Disorder
C) Social Anxiety Disorder
D) Generalized Anxiety Disorder
Correct Answer: B
Rationale: Separation Anxiety Disorder requires
developmentally inappropriate excessive fear/anxiety about
NR547 EXAM / ACTUAL NR547
DIFFERENTIAL DIAGNOSIS IN PSYCHIATRIC
MENTAL HEALTH ACROSS THE LIFESPAN
LATEST EXAM 2026/2027 ACCURATE EXAM
REAL QUESTIONS AND CORRECT DETAILED
ANSWERS (100% CORRECT VERIFIED
SOLUTIONS) LATEST UPDATED VERSION
|GUARANTEED PASS A+
Question 1
A 7-year-old boy is brought to clinic because his teacher
reports he cannot sit still, interrupts others, and fails to finish
,Page 2 of 233
assignments. Symptoms began at age 5 and occur both at
school and home. Which diagnosis is most likely?
A) Oppositional Defiant Disorder
B) Autism Spectrum Disorder
C) ADHD, Combined Presentation
D) Generalized Anxiety Disorder
Correct Answer: C
Rationale: ADHD Combined Presentation requires 6+
inattentive and 6+ hyperactive-impulsive symptoms (DSM-5-
TR). Symptoms before age 12, present in ≥2 settings, with
functional impairment.
Question 2
A 15-year-old female reports sad mood, weight loss, insomnia,
and loss of interest in soccer for 3 weeks. No prior episodes.
Her parents divorced 2 months ago. Best initial diagnosis?
A) Major Depressive Disorder, single episode
B) Adjustment Disorder with depressed mood
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C) Persistent Depressive Disorder
D) Bereavement
Correct Answer: A
Rationale: Symptoms meet MDD criteria (≥5 symptoms
including depressed mood and anhedonia, ≥2 weeks).
Adjustment Disorder is considered if symptoms are less than full
criteria, but here full MDD is present.
Question 3
An 8-year-old girl has severe temper outbursts 3–4 times
weekly for 18 months. Between outbursts, she is irritable and
angry most of the day. She is age 8. What is the best
diagnosis?
A) Bipolar I Disorder
B) Oppositional Defiant Disorder
C) Disruptive Mood Dysregulation Disorder
D) Intermittent Explosive Disorder
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Correct Answer: C
Rationale: DMDD requires onset before age 10, persistent
irritability between outbursts, and outbursts ≥3 times/week for
≥12 months. Age 6–18.
Question 4
A 6-year-old boy refuses to separate from his mother to
attend school. He has nightmares about harm befalling her
and physical complaints on school days. Duration 5 months.
Diagnosis?
A) School phobia
B) Separation Anxiety Disorder
C) Social Anxiety Disorder
D) Generalized Anxiety Disorder
Correct Answer: B
Rationale: Separation Anxiety Disorder requires
developmentally inappropriate excessive fear/anxiety about
