The correct answer is: a. Renuka Chamba.
The Renuka River is a river in the Indian state of Himachal Pradesh. It originates in the Dhauladhar Range of the Himalayas and flows through the Chamba district. The river is a tributary of the Ravi River.
The Macchial River is a river in the Indian state of Himachal Pradesh. It originates in the Pir Panjal Range of the Himalayas and flows through the Mandi district. The river is a tributary of the Beas River.
The Manimahesh River is a river in the Indian state of Himachal Pradesh. It originates in the Manimahesh Lake in the Chamba district. The river is a tributary of the Ravi River.
The Chandertal River is a river in the Indian state of Himachal Pradesh. It originates in the Chandertal Lake in the Chamba district. The river is a tributary of the Ravi River.
The Renuka River is the only river in the list that originates in the Chamba district. Therefore, it is the only river that is correctly matched with its origin.