This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra and penis, Subject name: Surgery
Cut off duration for diagnosis of Priaspism is: 
Select and explain. 
A. 1 hour, B. 2 hours, C. 3 hours, D. 4 hours
D: 4 hours
Answer: D: 4 hours 
Explanation: Priapism: It is defined as a persistent painful erection lasting longer than 4 hours irrespective of any sexual stimulation & beyond reaching of orgasm. It is an emergency situation It is of two types: Ischemic priapism Non-ischemic priapism