Q: 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.
Question: Heating of 4-methoxy-3,5-dinitrobenzenesulfonic acid with dilute sulfuric acid gives:
Options: <0> 4-Methoxy-3,5-dinitrophenol. <1> 3,5-Diamino-4-methoxybenzenesulfonic acid. <2> 4-methoxy-3,5-dinitrobenzenesulfonic acid anhydride <3> 2-Methoxy-1,3-dinitrobenzene. <4> An organic cation
A:
chemistry