instruction:
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'.
question:
Question: Nitric oxide: 
 Options:  <1> It is synthesized from methionine. <2> Activates cAMP-dependent protein kinase (PKA). <3> It binds to receptors coupled to G proteins (GPCR). <4> Induces relaxation of the vascular endothelium. <5> It binds to receptors with protein tyrosine kinase (PTK) activity.
answer:
4


question:
Question: The negative symptomatology of schizophrenia seems to be caused by: 
 Options:  <1> The excessive activity of some dopaminergic neural circuits. <2> The excessive activity of the GABAergic neurons. <3> The existence of brain damage. <4> Have a gene for schizophrenia that causes negative symptoms. <5> Insufficient activity of the serotonergic neurons of the frontal lobe.
answer:
3


question:
Question: The voltammetric methods of anodic redissolution: 
 Options:  <1> They are based on the preconcentration of analytes on the surface of an electrode and are characterized by their low sensitivity, since the surface of the electrode is very small. <2> They apply exclusively to the determination of traces of metals by oxidation on a mercury electrode. <3> They require the application of a stage of accumulation and another of redisolution in which intensity-time curves are recorded. <4> They are used for the determination of metals that, once deposited, are oxidized electrochemically. <5> They are based on the variation of the potential that the working electrode experiences as the deposited substance is redissolved.
answer:

4