This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Triple helix is found in 
Select and explain. 
A. Cystine, B. Collagen, C. Pectin, D. DNA
B: Collagen
Answer: B: Collagen 
Explanation: Robbins basic pathology 9th edition page no 63 The collagens are composed of three seperate polypeptide chains braided into a ropelike triple helix.