Definition: 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'.
Input: Question: The excitotoxins activate: 
 Options:  <1> Nicotinic receptors <2> GABAA receptors <3> Glycine receptors. <4> NMDA receivers. <5> Na + channels dependent on voltage.
