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 drugs cause diarrhea? 
Select and explain. 
A. Morphine, B. Atropine, C. Lithium, D. Magnesium sulfate
D: Magnesium sulfate
Answer: D: Magnesium sulfate 
Explanation: Ans. is 'd' i.e., Magnesium sulfate