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: Surgery
This is a specimen of 
Select and explain. 
A. FAP, B. Ulcerative colitis, C. Crohns disease, D. Peutz jeghers syndrome
A: FAP
Answer: A: FAP 
Explanation: This is a specimen of familial adenomatous polyposis with multiple polyps.Polyps are usually visible on sigmoidoscopy by the age of 15 years and will almost always be visible by the age of 30 years.Carcinoma of the large bowel develops 10-20 years after the onset of the polyposis.If over 100 adenomas are present at colonoscopy, the diagnosis can be made confidently.Ref: Bailey and love, 27e, page: 1260