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 small baby breathes about 45 times per minute while a child of about six years breathes about 25 times per minute.
A small baby breathes about
45 times per minute while
a child of about six years breathes about 25 times per minute.
No error.
Correct answer is D
No explanation has been provided for this answer.