`R-CH_(2)-CH_(2)OH` can be converted into `RCH_(2)CH_(2)COOH` the correct sequence of reagent is:

Options

A. `PB r_(3),KCN,H^(+)`
B. `PBr_(3),KCN,H_(2)`
C. `KCN,H^(+)`
D. `KCN,PB r_(3),H^(+)`

Answer

A

Explanation

`RCH_(2)CH_(2)OH overset(PBr_(3))toRCH_(2)CH_(2)Br overset(KCN)to RCH_(2)CH_(2)CN overset(H^(+))to RH_(2)CH_(2)COOH`