Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: The chemosmotic theory: 
 Options:  <1> It was proposed by Singer and Nicholson. <2> Explains the mechanism of phosphorylation at the substrate level. <3> It requires that the membranes in which it forms are closed compartments. <4> It does not explain the synthesis of ATP in photosynthesis. <5> It has nothing to do with redox reactions.
