The correct answer is A. Lakhisarai, Gaya.
The Kiul Irrigation Project is a major irrigation project in the Indian state of Bihar. It was constructed on the Kiul River, a tributary of the Ganges River. The project provides irrigation to over 1.5 million hectares of land in the districts of Lakhisarai, Gaya, Nalanda, and Patna.
The project was started in 1954 and completed in 1963. It consists of a dam, a barrage, and a canal system. The dam is located on the Kiul River, about 10 kilometers from the town of Lakhisarai. The barrage is located on the Sone River, about 10 kilometers from the town of Gaya. The canal system consists of a main canal and a number of branch canals.
The project has been a major success in terms of irrigation. It has helped to increase agricultural production in the region and has also helped to improve the lives of the people living in the area.
The other options are incorrect because they do not include the districts of Lakhisarai and Gaya.