This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Biochemistry
Stimulates the synthesis of milk proteins. 
Select and explain. 
A. LH, B. PRL, C. TSH, D. GH
B: PRL
Answer: B: PRL 
Explanation: PRL is the only hormone listed that stimulates the synthesis of milk proteins. PRL will induce a-lactalbumin, which will stimulate lactose production.