This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blistering disorders, Subject name: Dental
[{'content': 'Commonest variety of pemphigus:- \nSelect and explain. \nA. Pemphigus vulgaris, B. Pemphigus vegetans, C. Pemphigus foliaceous, D. Pemphigus erythematosus', 'role': 'user'}, {'content': "Answer: A \nExplanation: P. vulgaris is the most common It has a worldwide distribution M/C in middle aged adults, rare in children. Younger age at presentation in Indians compared to the West P. vegetans Benign variant of P. vulgaris (rare disease) 2 forms: Neumann and Hallopeau Involves interiginous areas and flexural surfaces P. foliaceous : less common, flacid subcorneal lesion with crusting and scaling on erosion over seborrheic areas. P. erythematous: variant of P. foliaceous with overlap with lupus erythematosus If 'vulgaris' is written at end then it is usually the most common variety of that disease", 'role': 'assistant'}]