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: Which compound acts as a sulfhydryl buffer and as an antioxidant?
Options: <0> Glycogen <1> Glutamic acid. <2> Glucagon. <3> Glutathione <4> Ascorbic acid.
Solution:
chemistry