The least stable free radical is

Options

A. `CH_(3)overset(.)CH_(2)`
B. `CH_(3)CH_(2)overset(.)CH_(2)`
C. `(CH_(3))_(2)overset(.)CH`
D. `(CH_(3))_(3)overset(.)C`

Answer

D

Explanation

As the number of hyperconjugative structures (`alpha`-H atoms) increases, stability of free radical increases.

Since, `overset(.)CH_(3)` has no hyperconjugative structure, so it is least stable.