Detailed 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.
Problem:Question: Pyruvate carboxylase is allosterically activated by one of the following compounds, what is it? 
 Options:  <0> Pyruvate. <1> Acetyl-CoA. <2> Malate. <3> Oxalacetate. <4> NAD +.
Solution:
chemistry