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: Medicine
In which one of the following diseases are intestinal polyps associated with malignancy ? 
Select and explain. 
A. Ulcerative colitis, B. Crohn's disease, C. Gardner's colitis, D. Peutz-jegher's syndrome
C: Gardner's colitis
Answer: C: Gardner's colitis 
Explanation: None