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'.

Example Input: Question: The glycolic fraction of the glycolipids of the membrane of eukaryotic cells: 
 Options:  <1> It is located on the cytoplasmic side of the membrane. <2> It always has sialic acid. <3> They are synthesized by the action of several glycosyl transferases. <4> It is a glucose oligomer. <5> It has no antigenic power.
Example Output: 3

Example Input: Question: After the reaction of some xenobiotics with glutathione, the final product is formed: 
 Options:  <1> Sulfanil urea. <2> Reduced glutathione <3> Oxidized glutathione. <4> Thiosulfate. <5> Mercapturic acid.
Example Output: 5

Example Input: Question: Which process is not related to a proton gradient ?: 
 Options:  <1> Oxidative phosphorylation <2> Synthesis of NADPH. <3> Glucolysis <4> Heat production <5> Active transport.
Example Output:
3