The correct option is
C A→ Nitrobenzene
B→ m-bromonitrobenzene
Ist reaction is Nitration: The replacement of H atom of a benzene ring by nitro group
(NO2). It is carried out by treating benzene with conc. nitric acid and conc. sulfuric acid.
2nd reaction is bromination at p-position of nitrobenzene as this position is more electrophilic.
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/1029459/original_47_sol_2818-2-2129.png)