The correct answer is: A. The Governor.
The Governor is the head of state of a state in India. He or she is appointed by the President of India on the advice of the Central Government. The Governor has the power to appoint the Chief Minister and other ministers of the state. He or she also has the power to dissolve the Legislative Assembly of the state.
The Speaker is the presiding officer of the Legislative Assembly of a state. He or she is elected by the members of the Assembly. The Speaker has the power to maintain order in the Assembly and to decide on the admissibility of motions and amendments.
The Chief Justice of the High Court is the head of the High Court of a state. He or she is appointed by the President of India on the advice of the Chief Justice of India. The Chief Justice of the High Court has the power to hear appeals from the lower courts in the state. He or she also has the power to give directions to the lower courts.
The Chairman is the presiding officer of the Legislative Council of a state. He or she is elected by the members of the Council. The Chairman has the power to maintain order in the Council and to decide on the admissibility of motions and amendments.
In conclusion, the Chief Minister is given oath by the Governor.