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: Physiology
True about High roughage in diet is : 
Select and explain. 
A. Decreases stool transit time, B. Increase stool transit time, C. Normalise stool transit, D. No effect on stool transit time
D: No effect on stool transit time
Answer: D: No effect on stool transit time 
Explanation: A i.e. Decreases stool transit time