Indian Polity · Polity

Consider the following situations in relation to the powers of the Governor of a State: I. Inviting a leader to form the government when no party has a clear majority in the Legislative Assembly II. Dismissing the Council of Ministers when it refuses to resign after losing the confidence of the Legislative Assembly III. Reserving certain bills passed by the State Legislature for the consideration of the President IV. Dissolving the Legislative Assembly when the Council of Ministers has lost its majority and no alternative government is possible How many of the above are constitutionally valid exercises of the Governor's discretionary powers?