How are cyclic hydrocarbons named?

Cyclic hydrocarbons are named the same as hydrocarbons (alkanes, alkenes, or alkynes) with the same number of carbon atoms, but with the prefix 'cyclo-' added.
If the cycle has several substituents, they are numbered so that they receive the lowest locators and are ordered alphabetically. In case of several options, the alphabetical preference order of the radicals will decide.
a) Only I is correct.
b) Only II is correct.
c) Both I and II are correct.
d) Neither I nor II is correct.