This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'A genetically modified rice called "golden rice" helps in combating the deficiency of - \nSelect and explain. \nA. Vitamin A, B. Vitamin C, C. Calcium, D. Zinc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p> Golden rice: Variety of rice produced through genetic engineering to boisynthesize beta carotene, a precursor of vitamin A. It is indented to produce a foified food to be grown and consumed in areas with a shoage of dietary vitamin A. Golden rice differs from its parenteral strain by the addition of three beta carotene biosynthesis gene. </p>', 'role': 'assistant'}]