In which of the following pairs A is more stable than B?

Answer

D

Explanation

Stability of radicals can be compared on the basis of electronic effects and angle strain.
In option (A): B is more stable than A due to resonance
In option (B): `3^(@)` radical is more stable as compared to `2^(@)`.
In option (C ): Since A has more angle strain than B, here B is more stable than A,
In option (D): A is more stable due to resonance. `Ph-undersetunderset(Ph)(|)overset(.)C-PhgtCH_(3)-undersetunderset(CH_(3))(|)oversetoverset(CH_(3))(|)(C^(.))`