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
[{'content': 'Most common pemphigus is – \nSelect and explain. \nA. Pemphigus vulgaris, B. Pemphigus vegetans, C. Pemphigus foliaceus, D. Pemphigus erythematosus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common variant of pemphigus\xa0→\xa0P. vulgaris\nLeast common variant of pemphigus\xa0→\xa0P. vegetans', 'role': 'assistant'}]