This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Psychiatry
Premature ejaculation is due to defect in which phase: 
Select and explain. 
A. Orgasm phase, B. Excitement phase, C. Resolution phase, D. Plateau phase
A: Orgasm phase
Answer: A: Orgasm phase 
Explanation: Premature ejaculation -Repeated ejaculation in less than 1 minute * Defect in orgasm phase Sexual response cycle (1) Desire * Hypoactive sexual desire disorder- Lack of desire sexual activity - Seen in females (2) Excitement * Erection * Vaginal lubrication * Erectile dysfunctions in males - anxiety most common cause - PDE -5 INHIBITORS - D/O/C (3) Orgasm* Premature ejaculation -Repeated ejaculation in less than 1 minute (4) RESOLUTION - 10- 15 minutes