This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory chain, Subject name: Biochemistry
Physiological uncoupler among the following is 
Select and explain. 
A. 2,4 dinitrophenol, B. Thermogenin, C. Oligomycin, D. Atractyloside
B: Thermogenin
Answer: B: Thermogenin 
Explanation: Thermogenin (or the uncoupling protein) is a physiological uncoupler found in brown adipose tissue that functions to generate body heat, paicularly for the newborn and during hibernation in animals. Reference: Harper; 30th edition; Page no: 13