Two isomeric forms of an organic compound A, `C_11H_13OCl` readily decolourise `Br_2//H_2O` and give same compound (B) on catalytic hydrogenation. Both the isomeric forms on vigorous oxidation give ( c) which on treatment with soda lime gives 2-chloroethoxy benzene. However, ( C) on treatment with Ni/Al alloy in alkaline medium gives 3-ethoxybenzoic acid. Only one of the isomers of (A) gives geometrical isomer D and E.
The structural formula of (A) is

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A.
B.
C.
D.