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 large scale exchange of nuclear weapons will produce unprecedented amounts of radiation that can penetrate into the biological tissue.

A.

A large scale exchange of nuclear weapons

B.

will produce unprecedented amounts of radiation

C.

that can penetrate into the biological tissue.

D.

No error.

Correct answer is C

that can penetrate the biological tissue.