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 Code of Ethics of Spanish Nursing: 
 Options:  <0> It constitutes the minimum standards of action for Nursing. <1> It is a deontological Ethics of maximums for Nursing. <2> It is a bridge between patrimonial and collegial responsibility. <3> It is a set of guidelines for professional practice. <4> It addresses the guidelines for proper assistance to the sick.
Example Output: nursery

Example Input: Question: What speed of perfusion of a drug should you administer to achieve a plasma equilibrium concentration of 10 mg / L knowing that it has a plasma clearance of 500 mL / h? (continuous perfusion): 
 Options:  <0> 50 mg / h. <1> 5 mL / h. <2> 100 mg / h. <3> 100 mg / mL. <4> 5 mg / h.
Example Output:
pharmacology