This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vitamins and Nutritional Deficiencies, Subject name: Social & Preventive Medicine
All are true about Vitamin C except:- 
Select and explain. 
A. It is water soluble vitamin, B. Most sensitive to heat, C. Potent antioxidant, D. Reduces ferrous iron to ferric iron
D: Reduces ferrous iron to ferric iron
Answer: D: Reduces ferrous iron to ferric iron 
Explanation: Vitamin C( Ascorbic acid): Water soluble vitamin. Potent antioxidant. Required for formation of collagen. Reduces ferric iron to ferrous iron thus increasing iron absorption. The most sensitive of all vitamins to heat. Deficiency =Scurvy - swollen and bleeding gums, S/C bruising, bleeding into the skin and joints, delayed wound healing, anaemia and weakness.