This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Which of the following is not required for wound healing 
Select and explain. 
A. Zinc, B. Calcium, C. Copper, D. Vitamin C
B: Calcium
Answer: B: Calcium 
Explanation: Nutritional status has profound effects on repair; protein deficiency, for example, and paicularly vitamin C deficiency, inhibits collagen synthesis and retards healing zinc is a cofactor in collagenase so zn deficiency impairs wound healing ref robbins 9th ed page 106