निम्नलिखित अभिक्रिया में, A एवं B क्रमशः है
`A overset(HBr ) to C_2 H_5 Br overset(B ) A `

Options

A. `C_2 H_4 ` एल्को. `KOH//Delta `
B. `C_2 H_5CI ,aq KOH //Delta `
C. `CH_3 OH,aq ,KOH //Delta `
D. `C_2 H_2 pBr _3`

Answer

A

Explanation

`C_2 H_4 overset(HBr) to C_2 H_5 Br underset( Delta )overset("एल्को. "KOH) to C_2 H_4`