1. A 25-year-old woman presents with low mood, fatigue, and anhedonia for the past 6 weeks. She has no significant medical history. What is the most likely diagnosis?

• A. Bipolar disorder
• B. Major depressive disorder
• C. Generalised anxiety disorder
• D. Schizophrenia

Explanation: Prolonged low mood and loss of interest in activities for >2 weeks are characteristic of major depressive disorder.

2. A 30-year-old man presents with excessive worry about various aspects of his life for over 6 months. He also reports restlessness, fatigue, and difficulty concentrating. What is the most likely diagnosis?

• A. Generalised anxiety disorder
• B. Panic disorder
• C. Obsessive-compulsive disorder
• D. Acute stress reaction

Explanation: Generalised anxiety disorder is characterised by excessive worry lasting >6 months with associated symptoms.

3. A 28-year-old man reports repetitive hand-washing and intrusive thoughts about contamination. What is the most likely diagnosis?

• A. Generalised anxiety disorder
• B. Obsessive-compulsive disorder
• C. Post-traumatic stress disorder
• D. Panic disorder

Explanation: OCD involves obsessions (intrusive thoughts) and compulsions (repetitive actions) to reduce anxiety.

4. A 50-year-old man presents with auditory hallucinations and delusions of persecution. What is the most likely diagnosis?

• A. Schizophrenia
• B. Bipolar disorder
• C. Generalised anxiety disorder
• D. Delirium

Explanation: Schizophrenia typically involves psychotic symptoms such as hallucinations and delusions.

5. A 35-year-old woman presents with episodes of intense fear, palpitations, and shortness of breath lasting a few minutes. What is the most likely diagnosis?

• A. Panic disorder
• B. Acute stress disorder
• C. Generalised anxiety disorder
• D. Social anxiety disorder

Explanation: Panic disorder involves sudden episodes of intense fear with physical symptoms such as palpitations.

6. A 40-year-old woman presents with low mood, hypersomnia, and weight gain during winter months. What is the most likely diagnosis?

• A. Seasonal affective disorder
• B. Bipolar disorder
• C. Major depressive disorder
• D. Cyclothymia

Explanation: Seasonal affective disorder is characterised by depressive symptoms in winter months.

7. A 22-year-old man reports a traumatic event and now has nightmares, flashbacks, and hypervigilance. What is the most likely diagnosis?

• A. Post-traumatic stress disorder
• B. Acute stress disorder
• C. Panic disorder
• D. Adjustment disorder

Explanation: PTSD includes flashbacks and hypervigilance following trauma.

8. A 60-year-old woman presents with memory loss, difficulty performing daily activities, and personality changes. What is the most likely diagnosis?

• A. Dementia
• B. Delirium
• C. Depression
• D. Schizophrenia

Explanation: Dementia involves progressive cognitive decline affecting daily functioning.

9. A 19-year-old woman presents with self-induced vomiting, distorted body image, and extreme fear of weight gain. What is the most likely diagnosis?

• A. Bulimia nervosa
• B. Anorexia nervosa
• C. Binge eating disorder
• D. Avoidant restrictive food intake disorder

Explanation: Bulimia nervosa includes binge eating followed by compensatory behaviours such as vomiting.

10. A 45-year-old man presents with chronic fatigue, low energy, and reduced interest in activities. He has also been using alcohol excessively. What is the most likely diagnosis?

• A. Depression with alcohol misuse
• B. Bipolar disorder
• C. Post-traumatic stress disorder
• D. Delirium

Explanation: Depression with alcohol misuse is common and requires integrated management.