Explanation: In English grammar, articles are used to indicate whether a noun is specific or general. There are two types of articles: "a" and "an" (indefinite articles) and "the" (definite article). Indefinite articles are used for non-specific items, while the definite article "the" is used for specific items.
When it comes to geographical locations, the use of articles can vary based on the specificity of the place. For specific places, such as national parks, rivers, mountains, and other landmarks, the definite article "the" is used. For example, "The Mouling National Park" is correct because it refers to a specific national park.
On the other hand, state names in India do not require an article. States are considered proper nouns and are treated as specific entities without the need for an article. Therefore, "Arunachal Pradesh" is correctly used without an article.
In the given sentence, "Mouling National Park" is a specific place, so it requires the definite article "the." "Arunachal Pradesh" is a state name and does not need an article. Thus, the correct sentence is "The Mouling National Park is situated in Arunachal Pradesh."
Understanding the use of articles in English grammar is crucial for correct sentence construction, especially when referring to specific places and proper nouns. This knowledge is particularly important in competitive examinations where questions on grammar and usage are common.