The correct answer is: Barakar.
The Barakar River is a river in the Indian state of Jharkhand. It is a tributary of the Damodar River. The Barakar River originates in the Rajmahal Hills and flows through the districts of Dumka, Deoghar, and Giridih. The river is about 250 kilometers long.
The Barakar River is an important source of water for irrigation and drinking water. The river is also a popular destination for fishing and boating.
The Barakar River is a beautiful river with a rich history and culture. The river is home to a variety of wildlife, including fish, birds, and reptiles. The river is also a popular destination for tourists.
The Barakar River is a vital part of the ecosystem of Jharkhand. The river provides water for irrigation, drinking water, and hydroelectric power. The river is also home to a variety of wildlife, including fish, birds, and reptiles. The river is a popular destination for tourists and is an important part of the culture of Jharkhand.
The other options are incorrect because they are not rivers that cross from Dumka district.
- Sankh River is a river in the Indian state of Jharkhand. It is a tributary of the Damodar River. The Sankh River originates in the Rajmahal Hills and flows through the districts of Dumka, Deoghar, and Giridih. The river is about 150 kilometers long.
- Karo River is a river in the Indian state of Jharkhand. It is a tributary of the Damodar River. The Karo River originates in the Rajmahal Hills and flows through the districts of Dumka, Deoghar, and Giridih. The river is about 200 kilometers long.
- Mayurakshi River is a river in the Indian state of West Bengal. It is a tributary of the Bhagirathi River. The Mayurakshi River originates in the Rajmahal Hills and flows through the districts of Dumka, Deoghar, and Giridih. The river is about 300 kilometers long.