This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
True about dietary fibres 
Select and explain. 
A. Increase stool transit time, B. Decrease post prandial glucose, C. Decrease bile salt reabsorption, D. Decrease LDL cholestrol
B: Decrease post prandial glucose
Answer: B: Decrease post prandial glucose 
Explanation: Dietary fibres exhibits laxation,blood cholestrol attenuation,blood glucose attenuationREF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-567.