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
Deficiency of vitamin C causes the following except 
Select and explain. 
A. Defective collagen synthesis, B. Soft swollen gums, C. Pigeon chest, D. Subcutaneous & other hemorrhage
C: Pigeon chest
Answer: C: Pigeon chest 
Explanation: None