Explanation: Subject-verb agreement is a fundamental principle in English grammar that ensures the subject and verb in a sentence agree in number. This means that if the subject is singular, the verb must also be singular, and if the subject is plural, the verb must be plural. This rule is essential for constructing grammatically correct sentences and is often tested in various competitive examinations.
In the given options, we need to identify the sentence that does not follow the rules of subject-verb agreement. Let's analyze each option:
- **Option A:** "Meenu and her cousins visit their friends in Bangalore."
- Here, "Meenu and her cousins" is a compound subject, which is plural. The verb "visit" is also plural, agreeing with the subject. This sentence is grammatically correct.
- **Option B:** "Meenu and her cousin visit their friends in Bangalore."
- In this sentence, "Meenu and her cousin" is a compound subject, which is plural. The verb "visit" is plural, agreeing with the subject. This sentence is grammatically correct.
- **Option C:** "Meenu and her cousin is visiting their friends in Bangalore."
- This sentence is grammatically incorrect. The subject "Meenu and her cousin" is a compound subject and should be treated as plural. However, the verb "is visiting" is singular, which does not agree with the plural subject. The correct form would be "are visiting" to match the plural subject.
- **Option D:** "Meenu's cousins are visiting their friends in Bangalore."
- Here, "Meenu's cousins" is a plural subject, and the verb "are visiting" is also plural, agreeing with the subject. This sentence is grammatically correct.
The key concept to remember is that when a subject is a compound subject (two or more subjects joined by "and"), the verb should agree with the plural form of the subject. In Option C, the verb does not agree with the plural subject, making it the incorrect sentence. Understanding and applying the rules of subject-verb agreement is crucial for constructing grammatically correct sentences in English.