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
Acantholysis is characteristic of – 
Select and explain. 
A. Pemphigus vulgaris, B. Pemphigoid, C. Erythema multoforme, D. Dermatitis herpetifonnis
A: Pemphigus vulgaris
Answer: A: Pemphigus vulgaris 
Explanation: Histologically the common denominator in all forms of pemphigus is acantholysis.