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
25 years old female has palatal ulcer and skin blister most likely diagnosis is – 
Select and explain. 
A. Pemphigus vulgaris, B. Pemphigus foliaceous, C. Dermatitis herpetiformis, D. Pemphigoid
A: Pemphigus vulgaris
Answer: A: Pemphigus vulgaris 
Explanation: Skin blister
Oral mucosa involvement (palatal ulcer)