In the alkene below why is He more easily abstracted by a ha

In the alkene below. why is He more easily abstracted by a halogen atom than HA ? HA Select one: A. Abstraction of HB produces a more stable free radical. B. Abstraction of Ha forms a carbocation, while abstraction of HA forms an carbanion. C. He is abstracted as a stable H ion, but HA is not D. Abstraction of Hg involves less steric hindrance

Solution

Abstraction of H_B  produces more stable free radical as it is in conjugation with the double bond, which will cause resonance.

And due to resonance the stability will be more.

Hence option-A is correct