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 reinforcement circuit can be activated by electrical stimulation of the mesolimbic system, originating in the ventral tegmental area and projecting:
Options: <1> To the hippocampus, inhibiting the release of dopamine. <2> To the nucleus accumbens, causing release of dopamine. <3> To the prefrontal cortex, stimulating the release of glutamate. <4> A mesencephalic reticular formation, causing release of glutamate. <5> To the pituitary, inhibiting the release of dopamine.
Example Output: 2

Example Input: Question: Alveolar pressure exceeds atmospheric pressure:
Options: <1> In the initial phase of inspiration. <2> In the middle phase of inspiration. <3> In the middle phase of an expiration. <4> At the end of expiration. <5> At the end of the inspiration.
Example Output: 3

Example Input: Question: In relation to the physiology of the complement system, one of the following statements is false:
Options: <1> Most of its components are inactive. <2> Its mode of activation is similar to the coagulation cascade. <3> It is subject to strict control of regulatory mechanisms. <4> It is only activated by two different routes: the classical and the alternative. <5> During its activation, multimolecular complexes are formed.
Example Output:
4