Correct Answer: Option C

A noun is the name given to a person, place, animal, or thing. Nouns are categorized into six main types: Proper, Common, Collective, Abstract, Countable, and Uncountable. Among these, a Proper Noun is used to denote a specific or definite name of a person, place, animal, or thing.

In the statement provided, "Kolkata is the capital of West Bengal," the words "Kolkata" and "West Bengal" are examples of Proper Nouns. These names specify the exact city and state, with Kolkata being the capital of West Bengal. Proper Nouns always start with a capital letter to signify their importance and uniqueness.

It is important to note that the phrase "capital of West Bengal" is commonly used to describe Kolkata because it is the administrative and cultural hub of the state. This reinforces the identification of Kolkata as a Proper Noun in this context.

Thus, the given sentence effectively illustrates the concept of Proper Nouns by highlighting the specific names of a city and a state, with Kolkata being recognized as the capital of West Bengal.