This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
Cancer can be prevented by ingestion of- 
Select and explain. 
A. Beta carotene, B. "VitaminC & E", C. Selenium, D. All the above
D: All the above
Answer: D: All the above 
Explanation: All the above mentioned are antioxidants . Antioxidants reduce the cell damage done by free radicals and reduce the chance of cancer activation . They prevent free radical damage to cells and improves immune function Ref Harrison 20th edition pg 98e