This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
The distinct golden colour in transgenic Golden rice is due to presence of 
Select and explain. 
A. Riboflavin, B. β-carotene, C. Vitamin B12, D. Xanthopyll
B: β-carotene
Answer: B: β-carotene 
Explanation: 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 fortified food to be grown and consumed in areas with a shortage of dietary vitamin A. 
Golden rice differs from its parenteral strain by the addition of three beta carotene biosynthesis gene.