The correct answer is: C. Purushani (Ravi).
The Dasrajan war (the battle of ten kings) was a battle fought between the Bharatas and the ten kings on the banks of the Purushani (Ravi) river. The battle was a victory for the Bharatas, and it led to the unification of the Aryan tribes in northern India.
The battle is described in the Mahabharata, one of the two major epics of ancient India. According to the Mahabharata, the Bharatas were led by King Bharata, while the ten kings were led by King Sudas. The battle was fought over the control of the Kurukshetra region, which is located in present-day Haryana, India.
The battle was long and bloody, and it resulted in the deaths of many warriors. In the end, the Bharatas were victorious, and they were able to unite the Aryan tribes in northern India. The Dasrajan war is an important event in Indian history, and it is often cited as an example of the Aryans’ military prowess.
The other options are incorrect because they are not the banks of the river where the Dasrajan war was fought. The Chenab river is located in present-day Pakistan, while the Sindhu river is located in present-day India. The Purushani river is now known as the Ravi river.