The grammatically incorrect sentence is: Option (A). The case holding the plates are broken.
The reason is Subject-verb agreement. The subject is "The case," which is singular. Therefore, the verb should also be singular, which is "is." In the given sentence, "are" is used, making Option A incorrect.
The correct sentence is: The case holding the plates is broken.
The other sentences are grammatically correct:
- Option (B): Either Ravi or Reena is attempting to come today. (Subject-verb agreement is correct: "Either" is treated as singular here.)
- Option (C): Both Ali and Anjana will have to take the test. (Subject-verb agreement is correct: "Both" is treated as plural here.)
- Option (D): The overall sentiment in the office is negative regarding the reports. (No subject-verb agreement issue, "sentiment" is the subject and "is" is the correct verb.)