This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Small amount of atropine is added to diphenoxylate because 
Select and explain. 
A. Suppress vomiting in gastro enteritis, B. Increase anti motility action, C. Block side effects of diphenoxylate, D. To decrease abuse of diphenoxylate
D: To decrease abuse of diphenoxylate
Answer: D: To decrease abuse of diphenoxylate 
Explanation: Atropine is an anti muscarinic drug diphenoxylate is an opoid drug which when given has propey of abuse hence atropine is added to it aas the anti muscarinic side effects of atropine will decrease the abuse of the drug. ReF:KDT 6/e p664