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: Organomagnesium compounds are commonly referred to as: 
 Options:  <1> Lipshutz <2> Birch. <3> Grignard. <4> Noyori <5> Blanc.
Example Output: 3

Example Input: Question: The activation of arterial baroreceptors causes: 
 Options:  <1> Stimulation of the bulbar pressure center. <2> Activation of the parasympathetic. <3> Increased blood pressure. <4> Tachycardia. <5> Positive inotropic effect.
Example Output: 2

Example Input: Question: What enzyme is present in complex II that participates in oxidative phosphorylation? 
 Options:  <1> Coenzyme Q: cytochrome c oxidoreductase. <2> NADH dehydrogenase. <3> Succinate-coenzyme Q reductase. <4> ATP synthase. <5> Cytochrome c oxidase.
Example Output:
3