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': 'The distinct golden colour in transgenic Golden rice is due to presence of - \nSelect and explain. \nA. Riboflavin, B. b-carotene, C. Vitamin B12, D. Xanthopyll', 'role': 'user'}, {'content': 'Answer: B \nExplanation: <p> Golden rice: Variety of rice produced through genetic engineering to boisynthesize beta carotene, a precursor of vitamin A. The distinct golden colour is due to the beta carotene content. 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'}]