The species responsible for nitration and sulphonation by nitric acid/conc. $H_2SO_4$ and fuming $H_2SO_4$ are :
- A$NO_2$ and $SO_3$
- B$NO_2^+$ and $SO_3$
- C$NO^+$ and $SO_2$
- D$NO_2$ and $SO_2$
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