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 gases is the most abundant in the alveolar air?
Options: <1> Oxygen. <2> Carbon dioxide <3> Water vapor. <4> Carbon monoxide. <5> Nitrogen.
Example Output: 5

Example Input: Question: The most accurate measurement of body temperature in an unconscious patient should be obtained at:
Options: <1> Oral. <2> Axillary. <3> It is indifferent. <4> Rectal. <5> Inguinal.
Example Output: 4

Example Input: Question: What neurotransmitter has a type of receptor called muscarinic ?:
Options: <1> Acetylcholine <2> Dopamine <3> Serotonin <4> Noradrenaline <5> Adrenalin.
Example Output:
1