This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Minerals, Subject name: Biochemistry
[{'content': 'Which of the following reaction is affected in patients of scurvy? \nSelect and explain. \nA. Carboxylation, B. Acetylation, C. Hydroxylation, D. Transamination', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Scurvy is due to deficiency of vitamin C. Vitamin C is required for lysyl and prolyl hydroxylases Vitamin C deficiency leads to defective post-translational modification of collagen - loss of tensile strength of blood vessels leading to:- - Bleeding gums -Ecchymoses - Easy bruisability -Poor wound healing (Features of scurvy).', 'role': 'assistant'}]