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: Anaesthesia
Drugs commonly used in pre-anaesthetic medication? 
Select and explain. 
A. Diazepam, B. Scopolamine, C. Morphine, D. All
D: All
Answer: D: All 
Explanation: A i.e. Diazepam; B i.e. Scopolamine; C i.e. Morphine