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: Surgery
All the following polyps are premalignant except: 
Select and explain. 
A. Juvenile polyp, B. Peutz Jegher's syndrome, C. Juvenile polyposis syndrome, D. Familial polyposis syndrome
A: Juvenile polyp
Answer: A: Juvenile polyp 
Explanation: Juvenile polyps which occur as solitary juvenile polyp or multiple juvenile polyps (2-4 polyps) have negligible malignancy risk. But Juvenile polyposis syndrome (greater than 5 polyps) has a definite malignancy risk of 30-60%. Familial adenomatous polyposis, if left untreated has a 100% relative risk of turning into malignancy. The relative risk of developing small bowel carcinoma in Peutz Jeghers syndrome is 18 fold greater than general population. So, the single best answer for the above question is juvenile polyp considering it as a solitary juvenile polyp. Ref: Current Surgical Diagnosis & Treatment, 12th Edition, Page709, 710,682; Bailey and Love's sho practice of surgery 24th edition page 1175-6; Harrison's Principles of Internal Medicine 18th edition, page 769- 770.