In the Newman projection for `2,2`- dimethylbutane

`X` and `Y` can, respectively, be

Options

A. `H` and `H`
B. `H` and `C_(2)H_(5)`
C. `C_(2)H_(5)` and `H`
D. `CH_(3)` and `CH_(3)`

Answer

B, D

Explanation

`H_(3)underset(4)(C)-underset(3)(C)H_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C_(2))-underset(1)(C)H_(3)`
On `C_(2)-C_(3)` bound axis,
`X=CH_(3)`
`Y=CH_(3)`
On `C_(1)-C_(2)` bond axis,
`X=H`
`Y=C_(2)H_(5)`