Which of the following of the following sequence will convert methyl cyanide to ethyl isocyanide ?

Options

A. `3_(square)^(+)O, LiAlH_(4), P//I_(2), AgCN`
B. `LiAlH_(4), NaNO_(2)//HCl, KCN`
C. `H_(3)O^(+), NH_(3), P_(2)O_(5)`
D. none of the above.

Answer

A

Explanation

`CH_(3)CN overset(H_(3)^(+)O)(rarr)CH_(3)COOH overset(LiAlH_(4))(rarr) CH_(3)CH_(2)OH overset(P//I_(2))(rarr) CH_(3)CHI overset(AgCN)(rarr)CH_(3)CH_(2)NC`