This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Which of the following has the highest potential of progression into a cancer? 
Select and explain. 
A. Adenomatous polyp, B. Juvenile polyp, C. Hyperplastic polyp, D. Hamartomatous polyp
A: Adenomatous polyp
Answer: A: Adenomatous polyp 
Explanation: Ans. (a) Adenomatous polypRef: Sabiston 20th edition, Page 1363* Highest malignant potential is villous adenoma > tubular adenomatous polyps