i. (A), a compound with lowest number of C atoms, is unsaturated hydrocarbon and is optically active.
ii. (B), a compound with lowest number of C atoms, is unsaturated hydrocarbon and shows diastereomerism.
iii. (C), a compound with lowest number of C atoms and unsaturated hydrocarbon, shows both optical and geometrical isomerism.
Following is the reaction sequence of A, B, and C.

The structure of compound (B) is:

Options

A.
B. `H- -= - -= -H`
C.
D. `= - =`

Answer

A

Explanation