Instructions: 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: Question: Statins are used to reduce cholesterol levels and act as analogs of the transition state of an enzyme involved in its biosynthesis. What enzyme is it?
Options: <0> 14-Alpha-demethylase. <1> Hydroxymethylglutaryl coenzyme A (HMGCoA) reductase. <2> Cyclooxygenase 2 (COX-2). <3> Squalene epoxidase. <4> Aromatase
Output:
pharmacology