The major products formed in the following reaction sequence $A$ and $B$ are :
- A$A$ = $C_6H_5COOK$,$B$ = $CHBr_3$
- B$A$ = $C_6H_5COCH_2Br$,$B$ = $C_6H_5COCH_2OH$
- C$A$ = $C_6H_5COCBr_3$,$B$ = $C_6H_5CHO$
- D$A$ = $C_6H_3Br_2COCH_3$,$B$ = $C_6H_3(OH)_2COCH_3$
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