Explanations:When correcting the sentence "K. Viswanadh is one of the best director in Andhra Pradesh," it is important to consider several grammatical aspects: subject-verb agreement, the use of prepositions, and the correct form of the noun.
Firstly, the subject "K. Viswanadh" is a singular noun, but the verb "is" agrees with it correctly. However, the phrase "one of the best director" contains a grammatical error. The word "director" should be in its plural form "directors" because the phrase "one of the" implies that there are multiple best directors, and Viswanadh is one among them. Therefore, the correct form is "one of the best directors."
Secondly, the preposition "in" is used correctly in the original sentence. The phrase "in Andhra Pradesh" indicates the location where Viswanadh is considered one of the best directors. The preposition "of" would be incorrect in this context because it would imply possession or belonging, which is not the intended meaning.
Option A is incorrect because it uses the singular form "director" and the preposition "of," which is not appropriate. Option B is incorrect because it uses the singular form "director" and implies that Viswanadh is the only best director, which contradicts the original meaning. Option C is incorrect because it uses the singular form "director" and the sentence structure is awkward and does not flow naturally. Option D is correct because it uses the plural form "directors" and the preposition "in" is appropriate, making the sentence grammatically correct and conveying the intended meaning.
Understanding these grammatical rules is crucial for constructing clear and accurate sentences. The correct sentence, "Viswanadh is one of the best directors in Andhra Pradesh," ensures that the subject and verb agree, the noun is in its correct form, and the preposition is used appropriately.