ChemistryIn the sulphonation, acetylation of benzene the group of effective electrophiles would be

In the sulphonation, acetylation of benzene the group of effective electrophiles would be

A
${SO}_{3}^{+}, {CH}_{3} C \equiv \overset{+}{O}$
B
${SO}_{3}, {CH}_{3} - C \equiv \overset{+}{O}$
C
${SO}_{3}, {CH}_{3} CHO$
D
${HSO}_{3}, {CH}_{3} CO$

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