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 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: Prosopagnosia is defined as: 
 Options:  <1> Extreme form of agnosia characterized by the inability to recognize familiar faces. <2> Failure to recognize objects by touch. <3> Loss of ability to visualize images. <4> Form of anosognosia in which the patient denies his blindness. <5> Perceptive experience of an amputated limb.
Example Output: 1

Example Input: Question: Which of the following chemicals is considered the most lethal individual carcinogen? 
 Options:  <1> Alcohol. <2> Smoke of the tabacco. <3> Tar. <4> Benzene. <5> Nickel.
Example Output:
2