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
Drug induced pemphigus is most commonly caused by – 
Select and explain. 
A. Penicillamine, B. Phenytoin sodium, C. Carbamazepine, D. Penicillin
A: Penicillamine
Answer: A: Penicillamine 
Explanation: Drug induced pemphigus is caused by penicillamine, rifampicin and captopril.