This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial Infection of Skin, Subject name: Skin
"Row of tomb stones" appearance is a feature of - 
Select and explain. 
A. Pemphigus, B. Pemphigoid, C. Irritant dermatitis, D. Herpes
A: Pemphigus
Answer: A: Pemphigus 
Explanation: Ans. is 'a' i.e., Pemphigus o Repeat from previous sessions.