The compound , whose stereo-chemical formula is written below exhibits x geometrical isomers and y optical isomers.

Question

 

The value of x and y are : 

 

$ (a)\;4\;and\;4 \\ (b)\;2\;and\;2 \\ (c)\;2\;and\;4 \\ (d)\;4\;and\;2 $