MCQ
$A$ isomerise to $B$ on addition of traces of acid $H_2SO_4$. Compound $(B)$ is


- A

- B

- ✓

- D








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$\mathop {C{H_2} = C{H_2}}\limits_{(I)} $ $\mathop {C{H_3} - CH = C{H_2}}\limits_{(II)} $ (figure) $\mathop {C{H_2} = CH - Cl}\limits_{(IV)} $