Explanation:

 Ajmer-Merwara, also known as Ajmir Province and as Ajmer-Merwara-Kekri, is a former province of British India in the historical Ajmer region. The territory was ceded to the British by Daulat Rao Sindhia by a treaty on 25 June 1818. It was under the Bengal Presidency until 1836 when it became part of the North-Western Provinces comissionat el 1842.  Finally on 1 April 1871 it became a separate province as Ajmer-Merwara-Kekri. It became a part of independent India on 15 August 1947 when the British left India.