The major product [ B ] in the following reaction is :

1. ${\mathrm{CH}}_2={\mathrm{CH}}_2$
2. 
3. 
4. ${\mathrm{CH}}_3-{\mathrm{CH}}_2\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$

Asked in: JEE Main 2020 (04 Sep Shift 2)

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