Q.Which option cannot complete: 'Democratic countries need a constitution to...' (check power / protect minorities / bring independence from colonial rule / ensure long-term vision / bring peaceful social change).

One classic justification for having a constitution at all is to restrain state power. Modern states hold something close to a monopoly on legitimate force, and if their institutions fall into the wrong hands, they can turn against the very people they exist to protect — a constitution's basic rules are meant to check this tendency and stop the state from becoming tyrannical. The Indian Constitution embodies a second, more ambitious idea on top of this restraining function: a constitution can also be a peaceful, democratic instrument of deep social transformation, not just a set of limits on already-existing power. For a country that had just emerged from colonial rule, the very act of writing its own constitution was the first real exercise of political self-determination. Jawaharlal Nehru expressed both ideas together: he argued that the demand for a Constituent Assembly was a demand for full self-determination, since only an elected body of Indian representatives had the right to frame India's constitution free of outside interference — and he described the Assembly itself not merely as a gathering of skilled lawyers, but as 'a nation on the move, throwing away the shell of its past political and possibly social structure, and fashioning for itself a new garment of its own making.' In this transformative spirit, the Indian Constitution was deliberately designed to break the shackles of traditional social hierarchy (such as caste) and usher in a genuinely new era of freedom, equality and justice. This reframes the whole theory of constitutional democracy: instead of existing only to limit people who already hold power, a constitution built this way exists to hand power to people who have traditionally been denied it, so that historically vulnerable groups can pursue collective good on their own terms.