The High Court of Bihar is located in:

Patna
Muzaffarpur
Gaya
Bhagalpur

The High Court of Bihar is located in Patna. It is the highest court in the Indian state of Bihar. The court was established in 1916 and is headquartered in Patna. The court has jurisdiction over all civil and criminal cases arising in the state of Bihar. The court is headed by the Chief Justice of the High Court of Bihar, who is assisted by a number of other judges. The court is divided into a number of benches, each of which is headed by a judge. The court has a number of powers, including the power to hear appeals from lower courts, the power to issue writs, and the power to decide constitutional matters. The court is an important part of the judicial system in India and plays a vital role in upholding the rule of law.

The other options are incorrect because they are not the location of the High Court of Bihar. Muzaffarpur, Gaya, and Bhagalpur are all cities in Bihar, but they are not the location of the High Court. The High Court is located in Patna, which is the capital of Bihar.