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In the chemical reaction, compounds A and B respectively are
A. fluorobenzene and phenol
B. benzene diazonium chloride and benzonitrile
C. nitrobenzene and chlorobenzene
D. phenol and bromobenzene

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Correct Answer - B
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Formation of A is by diazotization and formation of B from A is by `S_N` reaction. Thus the complete series of reaction is given by

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