At low temperatures, the slow addition o...

At low temperatures, the slow addition of molecular bromine to `CH_(2)=CH-CH_(2)-=CH` gives

A

`CH_2 = CH - CH_2 - CBr = CHBr` s

B

`BrCH_2 - CHBr - CH_2 - C -= CH`

C

`CH_2 = CH - CH_2 - CH_2 - CBr_3`

D

`CH_3 - C Br_2 - CH_2 - C -= CH`

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The correct Answer is:

A

At low temperatures, the mechanism is via formation of bromonium ion :

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