The number of guests (a)/ invited to the party (b)/ are five hundred (c) No error (

The sentence given has a grammatical error that can be identified and corrected. Here’s the breakdown of the sentence:

1. Identification of the Error: The subject of the sentence is "the number of guests," which is singular. Therefore, it should take a singular verb, not the plural verb "are."

2. Correction of the Sentence: The correct verb should be "is" instead of "are".

3. Revised Sentence: The corrected sentence should read: "The number of guests invited to the party is five hundred."

Final Answer

The error in the sentence is with the verb agreement. It should be: "The number of guests invited to the party is five hundred."