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 medication cannot be given in diarrhea in pregnancy ? 
Select and explain. 
A. Oral rehydration therapy, B. Stimulant purgative, C. Loperamide, D. Diphenoxylate-atropine
B: Stimulant purgative
Answer: B: Stimulant purgative 
Explanation: Ans. is 'b' i.e., Stimulant purgativeslRef: KDT 7/e p. 6741Stimulant purgatives:They are poweful purgatives: often produce griping. They irritate intestinal mucosa and thus were thought to primarily stimulate motor actIVIty.They can reflexly stimulate gravid uterus, therefore are contraindicated during pregnancy.