The correct answer is (a) Speaker of the Legislative Assembly.
The Speaker is the presiding officer of the Legislative Assembly. He/She is responsible for maintaining order in the House and ensuring that the proceedings are conducted in a fair and impartial manner. The Speaker also has the power to decide on matters of procedure and to rule on points of order.
The Chief Minister is the head of the government in a state. He/She is responsible for the day-to-day running of the state and for implementing the policies of the government. The Chief Minister is not directly involved in the proceedings of the Legislative Assembly.
The Governor is the head of state in a state. He/She is appointed by the President of India and represents the central government in the state. The Governor has the power to dissolve the Legislative Assembly and to appoint the Chief Minister. However, the Governor does not have any role in the day-to-day proceedings of the Legislative Assembly.
The Advocate General is the chief legal adviser to the government of a state. He/She is appointed by the Governor and is responsible for providing legal advice to the government on all matters. The Advocate General does not have any role in the proceedings of the Legislative Assembly.