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: Pathology
Row of tombstones appearance is seen in - 
Select and explain. 
A. Irritant dermatitis, B. Pemphigus, C. Pemphigoid, D. Herpes zoster
B: Pemphigus
Answer: B: Pemphigus 
Explanation: The Suprabasal acantholytic blister is characteristic of pemphigus vulgaris. The single layer of intact basal cells that forms the blister base has been likened to a row of tombstones.