The correct option is D all of these
Geometrical Isomerism arises due to different arrangement atoms/groups around a system where free rotation of bonds is restricted.
Free rotation of bonds can be restricted in following ways.
1) by double bond
2) by cyclic system
Cycloalkanes exhibit geometrical isomerism due to restricted rotation about single bond.
a, b are showing cis and trans isomerism. 'c' is showing syn and anti isomerism.