The correct answer is Rajasthan.
Mewati is a dialect of Hindi spoken in the Mewat region, which is located in the northern part of the Indian state of Haryana. The Mewat region is bordered by the Indian states of Rajasthan, Uttar Pradesh, and Delhi.
Mewati is a member of the Western Hindi group of dialects, which also includes Haryanvi, Braj Bhasha, and Kanauji. Mewati is closely related to Haryanvi, and the two dialects are often mutually intelligible.
Mewati is a tonal language, which means that the pitch of a speaker’s voice can change the meaning of a word. Mewati also has a complex system of verb conjugation, which is based on the tense, aspect, and mood of the verb.
Mewati is a living language, and it is spoken by millions of people in the Mewat region. Mewati is also used in literature and poetry.
The other options are incorrect because they are not states that border the Mewat region.