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: Physiology
Which one is an example of sho loop negative feedback mechanism 
Select and explain. 
A. TSH inhibiting TRH release from hypothalamus, B. T3, T4 inhibiting TSH release from anterior pituitary, C. TRH inhibiting its release from hypothalamus, D. T3, T4 inhibiting TRH release from hypothalamus
A: TSH inhibiting TRH release from hypothalamus
Answer: A: TSH inhibiting TRH release from hypothalamus 
Explanation: Ref: Guyton SAE, 1st ed, 538 and Sircar Principles of Physiology, 1st ed