The correct answer is: A. Arya Samaj.
The Arya Samaj was a Hindu reform movement founded in 1875 by Swami Dayanand Saraswati. It was one of the first Hindu reform movements to challenge the caste system and to promote education for women. The Arya Samaj also played a role in the Indian independence movement.
In 1926, the Arya Samaj proposed the separation of Haryana from the Punjab. The Arya Samaj argued that Haryana was a distinct cultural and linguistic region, and that it should have its own state. The proposal was not accepted at the time, but it was revived in the 1960s, and Haryana was eventually created as a separate state in 1966.
The other options are incorrect. The Indian National Congress was a political party that was founded in 1885. The All India Muslim League was a political party that was founded in 1906. The Hindu Mahasabha was a Hindu nationalist organization that was founded in 1925.