This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biological Function of Proteins, Subject name: Biochemistry
Taurine is biosynthesized from- 
Select and explain. 
A. Arginine, B. Leucine, C. Valine, D. Cysteine
D: Cysteine
Answer: D: Cysteine 
Explanation: Ans. D. Cysteine