This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pharmacology
Best for treatment of irritable bowel syndrome with spastic colon is 
Select and explain. 
A. Liquid paraffin, B. Senna, C. Bisacodyl, D. Dietary fibers
D: Dietary fibers
Answer: D: Dietary fibers 
Explanation: Ans. d (Dietary fibers). (Ref. KD Tripathi 5th ed. - 614)Spastic constipation/Irritable bowel1st choice laxative:# Dietary fibers# Bulk forming laxative such as Ispaghula, methylcellulose.While Stimulant purgatives like:# Castor oil,# Senna,# Bisacodyl, Phenolphthalein........ are contraindicated.