In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Input: Consider Input: Question: The number of pairs of metacentric chromosomes of the human karyotype is: 
 Options:  <0> 8 <1> 6 <2> Four. <3> 12 <4> two.

Output: biology


Input: Consider Input: Question: Immunoglobulin isotype change affects: 
 Options:  <0> The constant regions of the heavy chains. <1> The constant regions of the light chains. <2> The totality of heavy chains. <3> The entire immunoglobulin molecule. <4> The hypervariable regions of the heavy chains.

Output: biology


Input: Consider Input: Question: The determination of the concentration of one of the following proteins in serum can give us information of a possible hemolytic anemia. Indicate which: 
 Options:  <0> Transferrin <1> Hemosiderin. <2> Ceruloplasmin. <3> Ferritin. <4> Haptoglobin.


Output: pharmacology