A .   When a bill introduced by the state government is defeated in the state legislature

B .   If the President, on receipt of report from the Governor of the state, is satisfied that a situation is likely to arise in which the government of the state cannot be carried on in accordance with the provisions of the constitution

C .   If the President, on receipt of a report from the Governor of the state or otherwise is satisfied that a situation has arisen in which the government of the state cannot be carried on in accordance with the provisions of the constitution

D .   When the Governor and the Chief Minister   of a state differ on a vital issue