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': 'Desmoglein 1 antibody in a patient with flaccid bulla and erosions on the face and trunk and sparing the mucosa is seen in ? \nSelect and explain. \nA. Dermatitis Herpetiformis, B. P vulgaris, C. P foliaceous, D. Bullous pemphigoid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pemphigus vulgaris (most common) Pemphigus foliaceous Clinical feature:- Early disease - Dsg3 (Mucosa) Late disease - Dsg3 > Dsg1(Skin) Dsg-1 Only Skin involvement Investigations - Histological: Row of tombstone appearance + + DIF + + Fish net like Pattern + + IgG Ab Dsg 3 > 1 Dsg 1', 'role': 'assistant'}]