The correct answer is C. Both (A) and (B).
The Markanda River is a tributary of the Yamuna River in the Indian state of Haryana. It originates in the Shivalik Hills near the town of Paonta Sahib in Himachal Pradesh and flows through the districts of Yamunanagar, Kurukshetra, and Karnal before joining the Yamuna River near Panipat. The Markanda River is about 200 kilometers long.
The Tangri River is a tributary of the Markanda River in the Indian state of Haryana. It originates in the Shivalik Hills near the town of Pinjore in Panchkula district and flows through the districts of Mohali, Panchkula, and Kurukshetra before joining the Markanda River near Pehowa. The Tangri River is about 100 kilometers long.
Both the Markanda River and the Tangri River have traces of gold in their banks and bases. The gold is found in the form of small flakes and nuggets. The gold is believed to have been deposited in the rivers by the action of glaciers during the last Ice Age.
The gold in the Markanda River and the Tangri River is not commercially viable to mine. However, the gold is a popular tourist attraction. There are several gold panning sites along the banks of the rivers where tourists can try their luck at finding gold.