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: Biochemistry
Collagen formation is affected in deficiency of: 
Select and explain. 
A. Vit -A, B. Vit -C, C. Vit -B2, D. Vit -D
B: Vit -C
Answer: B: Vit -C 
Explanation: None