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
A middle aged female has flaccid bullae in the skin and oral erosion. Histopathology shows intraepidermal acanthololytic blisters. The most likely diagnosis is – 
Select and explain. 
A. Pemphigus vulgaris, B. Paraneoplastic pemphigus, C. Bullous pemphigoid, D. Dermatitis hepatiformis
A: Pemphigus vulgaris
Answer: A: Pemphigus vulgaris 
Explanation: Clues given are :-


Flaccid bullae
Oral erosion (mucosal involvement)
Intraepidermal acantholysis


Diagnosis is pemphigus vulgaris.