This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mood Disorders, Subject name: Psychiatry
Most common psychiatric disorder after stroke is? 
Select and explain. 
A. Anxiety, B. Depression, C. Mania, D. Bipolar disorder
B: Depression
Answer: B: Depression 
Explanation: Ans. is 'b' i.e., Depression Frequency of post storke psychiatric disorder* Depression: 35%* Catastrophic reaction: 20%* Anxiety disorder: 25%* Mania: rare* Apathy: 20%* Bipolar disorder: rare* Pathologic affect 20%* Psychosis: rare