This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Tzank smear is positive in – 
Select and explain. 
A. Herpes simplex, B. Psoriasis, C. LP, D. Warts
A: Herpes simplex
Answer: A: Herpes simplex 
Explanation: None