which of the following reactant is used to obatin above compound (A) (Assume that `EtO^(-)` is used in all the reaction )

Options

A.
B.
C.
D.

Answer

a

Explanation

`to` trans eleimation
`EtO^(-)` will bring about `E_(2)` elination of the reactant ,Hence we want grouip which are trans to each other .