This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
All are true about vitamin E except 
Select and explain. 
A. Act as antioxidant, B. Prevent lipd peroxidation of cell membrane, C. Water soluble vitamin, D. Chemically tocopheral
C: Water soluble vitamin
Answer: C: Water soluble vitamin 
Explanation: The E vitamins consist of eight naturally occurring tocopherols, of which a-tocopherol is the most active (Figure 28.28). The primary function of vitamin E is as an antioxidant in prevention of the nonenzymic oxidation of cell components, for example, polyunsaturated fatty acids, by molecular oxygen and free radicals. A. Distribution and requirements of vitamin E Vegetable oils are rich sources of vitamin E, whereas liver and eggs contain moderate.Deficiency of vitamin E Vitamin E deficiency is almost entirely restricted to premature infants. When observed in adults, it is usually associated with defective lipid absorption or transpo. The signs of human vitamin E deficiency include sensitivity of erythrocytes to peroxide and the appearance of abnormal cellular membranes. Ref: Lippincott, 5th edition, page no: 391