one word substitution.

[Sonia*]

Good Morning Teachers,
Please tell me one word for the following sentences:

1)that which can not be imitated.
2)no longer in use.

Thanks a million :D

[Mister Micawber]

1-- inimitable
2-- obsolete
_________________
Native English teacher at Mister Micawber's

[Sonia*]

Thanks a lot sir.

I have three sentences more:

1)to follow suit.
2)to call in question.
3)an apollo.

Please tell me one word for these sentences also.I would really appreciate your input as I always do.

[Mister Micawber]

1-- ?
2-- contest
3-- Adonis
_________________
Native English teacher at Mister Micawber's