Major product of given reaction is -
`O_2N-CH_2-undersetunderset(Cl)(|)CH-CH_3overset(overset(Theta)(O)H)underset(Delta)to` Major product
A. `O_2N-CH=CH-CH_3`
B. `O_2N-CH_2-CH=CH_2`
C. `O_2N-CH=undersetunderset(Cl)(|)C-CH_3`
D. `CH_2=undersetunderset(NO_2)(|)C-CH_3`