Part 1. Definition
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.
Part 2. Example
Question: A distension is defined as: 
 Options:  <0> Soft tissue injury. <1> Forced movement of abrupt production. <2> Injury by stretching a muscle. <3> Injury of the joint capsule. <4> Interruption in the continuity of a bone.
Answer: nursery
Explanation: Distension means Bloating and swelling in the belly area. It does not have much to do with chemistry, psychology, pharmacology, biology and medicine. Hence, the correct topic is nursery.
Part 3. Exercise
Question: The oxygen we consume in the respiratory chain is transformed into: 
 Options:  <0> Acetyl-CoA. <1> Carbon dioxide. <2> Carbon monoxide. <3> Water. <4> Carbonic acid.
Answer:
biology