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: Pathology
Vitreous humor of eye contains collagen type: 
Select and explain. 
A. Colagen I, B. Collagen II, C. Collagen III, D. Collagen IV
B: Collagen II
Answer: B: Collagen II 
Explanation: Collagen II