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.

Example Input: Question: The set of means and systems that facilitate the contact of the infectious agent with the recipient subject corresponds to: 
 Options:  <0> Source of infection. <1> Habitat. <2> Transmission mechanism. <3> Biotope <4> Reservoir.
Example Output: nursery

Example Input: Question: The presence (x = 1) or absence (x = 0) of bacteriuria has been determined in a group of subjects. What kind of variable is it? 
 Options:  <0> Ordinal. <1> Numeric <2> Categorical <3> Continuous quantitative <4> Discrete quantitative.
Example Output: medicine

Example Input: Question: The structures of the condensed chromosomes are maintained by: 
 Options:  <0> Topoisomerases <1> Nucleolus proteins. <2> Fragments of Okazaki. <3> SMC proteins. <4> DNMT1 protein.
Example Output:
pharmacology