Which hydrogen in compound E is easily replaceable during bromination reaction in presence of light ?

Which hydrogen in compound $(E)$ is easily replaceable during bromination reaction in presence of light ?

$β$ - hydrogen
$δ$ - hydrogen
$α$ -hydrogen
$γ$ - hydrogen

Solution

Allylic radial is more stable due to resonance.

Rate of reaction

\propto

Stability of free radical

Asked in: JEE Main 2019 (10 Jan Shift 1)

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