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# Amongest the following compounds which can be most easily sulphonated is

$\begin{array}{1 1}(a)\;\text{Benzene}&(b)\;\text{Nitrobenzene}\\(c)\;\text{Toluene}&(d)\;\text{Chlorobenzene}\end{array}$

Due to the presence of an electron donating group ($-CH_3$ group has +I effect),electrophilic substitution becomes easier.