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: Derived from blood monocytes: 
 Options:  <0> Protoplasmic astrocyte. <1> Fibrous astrocyte. <2> Oligodendrocyte <3> Microgliocyte <4> Satellite cell.
Example Output: biology

Example Input: Question: In general, viruses that have a naked capsid: 
 Options:  <0> They are stable against drying. <1> They are commonly released from the host cell by budding. <2> They are very sensitive to detergents. <3> They are very sensitive to the conditions in the intestinal tract. <4> They can not be neutralized by host antibodies.
Example Output: biology

Example Input: Question: Sodium metal reacts violently with water because Na: 
 Options:  <0> Oxidize the water to oxygen, and the reaction is very exothermic. <1> It reduces the water to hydrogen, and the reaction is very exothermic. <2> Oxidizes the water to oxygen, and when a gas is generated, the entropy increases enormously. <3> It reduces the water to hydrogen, and the reaction is very endothermic. <4> It combines with water giving rise to an explosive hydride.
Example Output:
chemistry