The correct answer is: A. Khari Boli
Haryanvi is a Western Hindi language spoken in the Indian state of Haryana. It is also spoken in parts of the neighboring states of Punjab, Rajasthan, Uttar Pradesh, and Delhi. Haryanvi is a member of the Indo-Aryan language family, and is closely related to other Western Hindi languages such as Punjabi, Rajasthani, and Braj Bhasha.
Khari Boli is a dialect of Hindi that is spoken in the northern plains of India. It is the standard dialect of Hindi that is used in formal settings, such as education and government. Khari Boli is also the basis for many of the other Hindi dialects, such as Haryanvi, Braj Bhasha, and Awadhi.
Urdu is a language that is spoken in India, Pakistan, and Bangladesh. It is a member of the Indo-Aryan language family, and is closely related to Hindi. Urdu is written in the Perso-Arabic script, and is the official language of Pakistan.
Sanskrit is a classical language that is spoken in India. It is a member of the Indo-Aryan language family, and is the oldest language in the world that is still in use. Sanskrit is the language of the Vedas, the Hindu scriptures. It is also the language of classical Indian literature and philosophy.
In conclusion, Haryanvi is a part of the Khari Boli dialect of Hindi.