Who among the following was the first ruler in the history of India to form permanent army ?

Q. Who among the following was the first ruler in the history of India to form permanent army ?
Answer: Bimbisar
Notes: Bimbisar of Haryanka dynasty was the first ruler to form permanent army. He was the son of Bhattiya and was considered the main founder of Haryanka dynasty of Magadha. Haryanka dynasty was the third ruling dynasty of Magadha after Pradyota and Brahadratha dynasty.