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: The innate immune response to viruses is mainly mediated by lymphocytes: 
 Options:  <1> B1 <2> Th1. <3> Cytolytic T <4> NK <5> Tγδ.
4

Question: Retrograde amnesia is defined as: 
 Options:  <1> Memory loss that covers the period before the onset of the disorder that gave rise to amnesia. <2> Memory loss that covers the period following the onset of the disorder that gave rise to the amnesia. <3> Partial loss of memory that covers a specific period. <4> Memory loss in the absence of an organic brain disorder. <5> Distortions or memory errors.
1

Question: Presents centroacinosas cells the gland: 
 Options:  <1> Parotid. <2> Submaxillary <3> Sublingual <4> Pancreas. <5> Liver.

4