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 main method for the preparation of βceto esters is the reaction known as: 
 Options:  <0> Malonic synthesis <1> Acetoacetic synthesis. <2> Condensing of Claisen. <3> Perkin reaction. <4> Hofmann reaction.

Output: pharmacology


Input: Consider Input: Question: Vasconstricts systemic arterioles: 
 Options:  <0> Low pO2. <1> Low pH. <2> Angiotensin II. <3> Acetylcholine <4> Nitric oxide.

Output: biology


Input: Consider Input: Question: The method of continuous variations is used in molecular absorption spectrophotometry to: 
 Options:  <0> Determine the position of the isobestic point in a mixture of absorbent species. <1> Calculate the exact position of the absorption maximum of an absorbent complex. <2> Obtain the pH corresponding to the end point of the titration of an absorbing acid or base. <3> Calculate the stoichiometry of an absorbent complex. <4> Calculate the exact value of the dissociation constant of an absorbent acid.


Output: chemistry