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: Pathology
Least cariogenic among these: 
Select and explain. 
A. Raw starch., B. Cooked starch., C. Sucrose., D. Fructose
A: Raw starch.
Answer: A: Raw starch. 
Explanation: None