Bihar’s fish resources are primarily found in:

The correct answer is: d) All of the above.

Bihar’s fish resources are primarily found in rivers, lakes and reservoirs, ponds and tanks.

• Rivers: Bihar is home to several major rivers, including the Ganges, the Son, and the Gandak. These rivers provide a habitat for a variety of fish species, including carp, catfish, and tilapia.
• Lakes and reservoirs: Bihar also has a number of lakes and reservoirs, which are important sources of fish. The largest lake in Bihar is the Falgu Lake, which is home to a variety of fish species, including the Indian major carp, the rohu, and the catla.
• Ponds and tanks: In addition to rivers and lakes, Bihar also has a large number of ponds and tanks. These ponds and tanks are used for irrigation, but they also provide a habitat for fish. The most common fish species found in ponds and tanks in Bihar are the carp, the catfish, and the tilapia.

Bihar’s fish resources are an important part of the state’s economy. The fish industry provides employment for a large number of people, and it also contributes to the state’s food security.