This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance Related and Addictive Disorders, Subject name: Psychiatry
Which is not a feature of caffeine withdrawal? 
Select and explain. 
A. Headache, B. Hallucinations, C. Depression, D. Weight gain
B: Hallucinations
Answer: B: Hallucinations 
Explanation: No hallucinations are seen in caffeine withdrawal. Effects of Caffeine Withdrawal : 1.Lethargy 2.Mild depression of mood 3.Increased appetite with slight weight gain 4.Fatigue 5.Headache