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: They are primary lymphoid organs: 
 Options:  <0> Spleen and lymph nodes <1> The spleen and bone marrow. <2> The thymus and the bone marrow. <3> The pineal gland <4> Peyer's plates and tonsils.
Example Output: biology

Example Input: Question: The main virulence factor of Streptococcus pneumoniae is one (one): 
 Options:  <0> Fímbria. <1> Capsule. <2> Scourge <3> Endotoxin <4> Adhesin
Example Output: biology

Example Input: Question: Type I pneumocytes: 
 Options:  <0> They produce surfactant. <1> They give rise to type II pneumocytes. <2> They have a lot of organelles. <3> They are responsible for gas exchange. <4> They are mesenchymal cells.
Example Output:
biology