The correct answer is: Legislative Assembly (Vidhan Sabha).
The Legislative Assembly is the lower house of the bicameral legislature of Bihar, India. It is unicameral and consists of 243 members, who are elected directly by the people of Bihar for a term of five years. The Speaker is the presiding officer of the Legislative Assembly.
The Legislative Council is the upper house of the bicameral legislature of Bihar, India. It is a permanent body and consists of 75 members, who are elected by the members of the Legislative Assembly, the members of the local bodies, and the graduates and teachers of the state. The Chairman is the presiding officer of the Legislative Council.
The Governor is the head of the state of Bihar. He is appointed by the President of India for a term of five years. The Governor has the power to dissolve the Legislative Assembly, to appoint the Chief Minister and the Council of Ministers, and to veto the bills passed by the Legislative Assembly.
The Parliament of India is the supreme legislative body of India. It is a bicameral legislature consisting of the Lok Sabha (the lower house) and the Rajya Sabha (the upper house). The Parliament is responsible for making laws for the whole of India.
The Legislative Assembly is the most powerful of the four bodies mentioned in the question. It has the power to make laws, to approve the budget, and to remove the government from office. The Legislative Council is a weaker body. It has the power to delay the passage of bills, but it cannot veto them. The Governor is a constitutional head and has limited powers. The Parliament of India is the supreme legislative body, but it does not have any power over the state of Bihar.