The correct option is C When there is a breakdown of law and order in one of India's states.
There are three provisions for emergencies in the Constitution of India. Firstly, when the country has a National Emergency- like in the case of war, an external attack or armed rebellion. Secondly, a Constitutional Emergency is declared when there is law and order breakdown in a state. Thirdly, in the case of monetary crisis or Financial Emergency, the central government is given powers and responsibilities.