Read the sentence below to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Choose the option with that part as your answer. If there is no error, choose 'D' as your answer. (Ignore the errors of punctuation, if any).

A free press is not a privilege but the organic necessity in a free society.

A.

A free press is not a privilege

B.

but the organic necessity

C.

in a free society.

D.

No error.

Correct answer is B

but an organic necessity