The `IUPAC` name of the well known terpene camphor having the structure
is
A. 6-Oxo-1,2,2-Trimethylbicyclo [2,2,1] heptane
B. 1,7,7-Trimethylbicyclo [2.2.1] heptan-2-one
C. 1,5,5, Trimethylbicyclo [2.1.1] heptan-2-one
D. 1,7,7-Trimethylbicyclo [2.1.2] heptan-2-one