The Diels `-` Alder reaction between `1,3-`cyclo`-` hexandiene and acrylonitrile gives the adduct,
Its `IUPAC` name is
A. Bicyclo`[2.2.2]` oct`-2-`en`-5-`nitrile
B. Bicyclo`[2.2.2.]` oct`-5-`en`-2-`carbonitrile
C. `3-`Cyanobicyclo`[2.2.2]`oct`-5-`ene
D. `2-`Cyanobicyclo`[2.2.2]`oct `-5-`ene