A compound named `5-(1-`cyanotethyl `)-2-`methyl hexanoic acid has something wrong according to `IUPAC`. What is its correct `IUPAC` name ?
A. `5-`ethyl cyanide `-2-`methyl hexanoic acid
B. `6-`cyano`-2,5-`dimethyl heptanoic acid
C. `6-`cyano`-5-`methyl`-2-`heptanoic acid
D. `6-`carboxy `-2,3-`dimethyl heptanenitrile
