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
The distinct golden colour in transgenic Golden rice is due to presence of - 
Select and explain. 
A. Riboflavin, B. b-carotene, C. Vitamin B12, D. Xanthopyll
B: b-carotene
Answer: B: b-carotene 
Explanation: <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>