This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Pathology
The minimum number of polyps necessary for a diagnosis of Familial Adenomatous Polyposis (FAP) is: 
Select and explain. 
A. 5, B. 10, C. 50, D. 100
D: 100
Answer: D: 100 
Explanation: Ans. (d) 100(Ref: Robbins 9th/pg 809; 8th/pg 820-824)Classic FAP -At least 100 polyps are necessary for a diagnosis QAttenuated FAP-lower number of adenomatous polyps (around 30)