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: Pharmacology
Drugs causing painful salivary glands all except ? 
Select and explain. 
A. Phenybutazone, B. Ambroxol, C. Clozapine, D. Iodides
B: Ambroxol
Answer: B: Ambroxol 
Explanation: Ans. is'b'i.e., Ambroxol[Ref: httpL/www.ijohmr.com/upload/Adverse%o20Efects%20of/o20Drugso/o20on%o20Salivary%o20Glands.pdflDrugs associated with salivary gland enlargementClozapine may cause transient salivary gland swelling as well as sialorrhea.