The `IUPAC` name of is

Options

A. (1) `2`-methyl-`3`-(`1`-methylethyl)-`4`-oxopentanenitrile
B. (2) `4`-cyano-`3`-(`1`-methylethyl)pentan-`2`-one
C. (3) `3`-acetyl-`2`-cyano-`4`-methylpentane
D. (4) `3`-ethanoyl-`2`-methyl-`3`-(`1`-methylethyl)pentaneni-trile

Answer

A

Explanation

The principal function is `-C-= N`, thus, the compound should be named as alkanenitrile. The `C` atom of the `-C-=N` group is numbered `1`: