The correct answer is: Governor.
The Governor is the head of state of Gujarat. He is appointed by the President of India on the advice of the Central Government. The Governor has the power to dissolve the Legislative Assembly, appoint the Chief Minister and other ministers, and give assent to bills passed by the Legislative Assembly.
The Chief Minister is the head of government of Gujarat. He is elected by the members of the Legislative Assembly. The Chief Minister has the power to appoint other ministers, to allocate portfolios to ministers, and to preside over the meetings of the Council of Ministers.
The President of India is the head of state of India. He is elected by an electoral college consisting of members of both Houses of Parliament and the Legislative Assemblies of the states. The President has the power to appoint the Prime Minister, the Chief Justice of India, and other judges of the Supreme Court and the High Courts.
The Prime Minister is the head of government of India. He is appointed by the President of India. The Prime Minister has the power to appoint other ministers, to allocate portfolios to ministers, and to preside over the meetings of the Cabinet.