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: Which of the following anti-infectives is a reversible inhibitor of monoamine oxidase that can lead to interactions with antidepressants that increase serotonin? 
 Options:  <1> Neomycin. <2> Teicoplanin <3> Linezolid. <4> Clindamycin <5> Meropenem.
Example Output: 3

Example Input: Question: The reaction product of cyclohexanone with bromine catalyzed by a base is: 
 Options:  <1> 2-Bromocyclohexanone. <2> 2,2-Dibromocyclohexanone. <3> 2,2,6-Tribomociclohexanona. <4> 1,1-Dibromocyclohexane. <5> 2,2,6,6-Tetrabromocyclohexanone.
Example Output: 5

Example Input: Question: It usually protects the DNA of a restriction enzyme: 
 Options:  <1> Methylation of a nitrogenous base. <2> Glycosylation of a nitrogenous base. <3> Acetylation of deoxyribose. <4> Phosphorylation of deoxyribose. <5> Loss of one of the hydroxyl groups of phosphate.
Example Output:
1