This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Psychiatry
Duration required for the diagnosis of acute and transient psychosis is 
Select and explain. 
A. 1 week, B. 2 weeks, C. 1 month, D. 6 months
B: 2 weeks
Answer: B: 2 weeks 
Explanation: If symptoms are for less than 1 months, it is a transient psychotic disorder or brief psychotic disorder as per DSM. As per ICD 10, acute psychosis is less than 2 weeks duration. Reference: Kaplon and sadock, 11 th edition, synopsis of psychiatry, 11 th edition, pg no. 340