In the sulphonation, acetylation and for...

In the sulphonation, acetylation and formlylation of benzene the group of effective electronphiles would be ? (X)

A

`SO_3^(+), CH_3-C -=O^(+),overset(+)CHO`

B

`SO_3,CH_3-C-=O^(+),Hoverset(+)CO`

C

`SO_3,CH_3-CO,CO+HCl`

D

`HSO_3,CH_3-CO,Hoverset(+)CO`

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The correct Answer is:

B

Group of electrophile given in 2nd is true.

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