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
Has its release inhibited by thyroxine. 
Select and explain. 
A. LH, B. PRL, C. TSH, D. GH
C: TSH
Answer: C: TSH 
Explanation: Thyroxine (the end product) inhibits the release of TSH by the anterior pituitary. Thyroxine has no effect on the release of LH, PRL, GH, or FSH.