. In the following question, one part of the sentence may have an error. Find out which part of the sentence has an error and click the option corresponding to it. If the sentence, is free from error, click “No error” option. My grandmother (P)/ has invited you (Q)/  at dinner tonight at her apartment.(R)/ No error (S).?

Option 3 : R

Correct option 3

The error lies in part R of the sentence. Hence, correct answer is option 3.

In the above sentence, the error lies in usage of preposition. The subject is talking about a specific line of action, since there is no mention of time or no establishment of a connection between two places, 'at' is the incorrect preposition.

'For' is the preposition that has to be used as it indicates, a definite purpose as to why the subject has to follow a line of action or thought.

Correct sentence:

My grandmother has invited you for dinner tonight at her apartment.