The primary responsibility of the Board of Revenue in Odisha is:

Revenue administration
Land reforms
Disaster management
Law enforcement

The primary responsibility of the Board of Revenue in Odisha is revenue administration. The Board of Revenue is a statutory body constituted under the Odisha Revenue Administration Act, 1953. It is headed by the Revenue Divisional Commissioner (RDC) and has two members, one of whom is a retired IAS officer and the other is a retired judicial officer. The Board is responsible for the administration of land revenue, stamps and registration, excise, and other revenue matters in the state.

Land reforms are the process of changing the ownership or use of land. They can be carried out by the government or by private individuals. Land reforms are often used to redistribute land more equitably, to improve agricultural productivity, or to protect the environment.

Disaster management is the process of reducing the risk of disasters and mitigating the effects of disasters that do occur. It includes activities such as hazard identification, risk assessment, disaster preparedness, disaster response, and disaster recovery.

Law enforcement is the act of enforcing the law. It is carried out by the police, the courts, and the corrections system. Law enforcement is necessary to protect the public from crime and to ensure that the law is obeyed.

The correct answer is (a).