This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: S.T.D., Subject name: Skin
Recurrent genital ulcer is caused by 
Select and explain. 
A. HSV 1, B. HSV 2, C. HSV 3, D. HSV 4
B: HSV 2
Answer: B: HSV 2 
Explanation: Ans. is 'b' i.e., HSV 2 o Most common cause of recurrent genital ulcer is HSV.o Infact, the characteristic feature of Herpes genitalis is that it is recurrent,o Genital ulcer is caused by HSV 2.