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: Pharmacology
Thyroid gland function is best monitored by which of the following: 
Select and explain. 
A. Basal metabolic rate (BMR), B. Thyroxine and tri–iodothyronine uptake, C. Level of thyroid stimulating hormone, D. Level of protein bound iodine
C: Level of thyroid stimulating hormone
Answer: C: Level of thyroid stimulating hormone 
Explanation: None