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
Dextromethorphan should not be given with drug? 
Select and explain. 
A. SSRIs, B. MAO inhibitors, C. Atropine, D. Parcetamol
B: MAO inhibitors
Answer: B: MAO inhibitors 
Explanation: Ans. is'b'i.e., MAO inhibitors[Rl Katzung L2nle p. 559, KDT /e p. 213,215)The antitussive dextromethorphan should also be avoided by patients taking one of the monoamine oxidase B inhibitors; indeed, it is wise to advise patients to avoid all over-the-counter could preparations.