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
Mechanism of 2-4 Dinitrophenol is - 
Select and explain. 
A. Inhibition of both ATP synthesis and ETC, B. Inhibition of ATP synthesis only not ETC, C. Inhibition of only ETC not ATP synthesis, D. None of the above
B: Inhibition of ATP synthesis only not ETC
Answer: B: Inhibition of ATP synthesis only not ETC 
Explanation: Ans. is 'b'i.e., Inhibition of ATP synthesis only not ETC o Has been explained in previous session