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: Social & Preventive Medicine
Recommended daily intake of fibre in diet 
Select and explain. 
A. 20 grams, B. 40 grams, C. 80 grams, D. 100 grams
B: 40 grams
Answer: B: 40 grams 
Explanation: None