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': '25 years old female has palatal ulcer and skin blister most likely diagnosis is – \nSelect and explain. \nA. Pemphigus vulgaris, B. Pemphigus foliaceous, C. Dermatitis herpetiformis, D. Pemphigoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Skin blister\nOral mucosa involvement (palatal ulcer)', 'role': 'assistant'}]