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
Which of the following component in diet determines glycemic index of food? 
Select and explain. 
A. Protein, B. Fat, C. Fibre, D. None of the above
C: Fibre
Answer: C: Fibre 
Explanation: Some foods contain different fractions of soluble and insoluble fibres that our slow release of sugar into small intestine and its absorption into blood. They are termed as food with low glycemic index. Ref: Park 22nd edition, page 568