This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vestibulobullous disorders, Subject name: Dental
[{'content': 'The commonest type of Pemphigus is \nSelect and explain. \nA. Pemphigus vulgaris, B. Pemphigus foliaceous, C. Pemphigus erythematous, D. Pemphigus vegetans', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pemphigus vulgaris is the most common form of pemphigus and occurs when antibodies attack Desmoglein 3. Usually begins with painful blisters in your mouth and then on the skin or genital mucous membranes. Ref Harrison20th edition pg 1334', 'role': 'assistant'}]