Which statement is true about a molecule with the molecular formula C10H20, that when subjected to catalytic hydrogenation there is no consumption of hydrogen?

a. The molecule has no degrees of unsaturation.
b. There is one degree of unsaturation, which happens to be a pi-bond.
c. There are two degrees of unsaturation where one is a ring and the other is a pi-bond.
d. There is one degree of unsaturation, which happens to be a ring.
e. None of the above.