Parts of the following sentence have been given as options. Select the option that contains an error in spelling. If you don't find any error, mark 'No error' as your answer.
This visit is a unique opportunity for her to learn about the Indian school system.

Correct option is D

There is no spelling error in the given sentence. All parts of the sentence are correctly spelt and grammatically accurate.

So option (d) "No error" is correct, as there is no error in any part of the sentence.