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
Which of the following antitussive can lead to hallucinations 
Select and explain. 
A. Morphine, B. Dextromethorphan, C. Diphenhydramine, D. Aprepitant
B: Dextromethorphan
Answer: B: Dextromethorphan 
Explanation: Dextromethorphan is a NMDA antagonist used for Mild cough, which can lead to hallucination & addiction.