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: Consider Input: Question: What serum immunoglobulin will synthesize an activated B lymphocyte that has not been stimulated through CD40 ?: 
 Options:  <1> Any. <2> IgE <3> IgM <4> IgA <5> IgG

Output: 3


Input: Consider Input: Question: Which of these statements is NOT a characteristic of phase I clinical trials? 
 Options:  <1> They usually have non-therapeutic goals. <2> They can be done in healthy volunteers. <3> They can be done in patients. <4> They are usually randomized. <5> They are usually open.

Output: 4


Input: Consider Input: Question: A characteristic component of murein or peptidoglycan in most bacterial species is: 
 Options:  <1> The dipicolinic acid. <2> L-glutamic acid <3> The D-alanine. <4> The mannosamine. <5> The diaminoglycoside


Output: 3