This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
[{'content': 'Type of collagen present in vitreous humor \nSelect and explain. \nA. Collagen type 1, B. Collagen type 2, C. Collagen type 3, D. Collagen type 4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: COLLAGEN Ref:- Sima Jain; pg num:- 10', 'role': 'assistant'}]