The correct options are
A The Bill of Rights of the United States of America
B Ideals of the French Revolution like liberty, equality, and fraternity
C The practice of parliamentary democracy in Britain
While framing the Indian Constitution, many of our leaders were inspired by the ideals of the French Revolution, the practice of parliamentary democracy in Britain, and the Bill of Rights in the US. The socialist revolution in Russia had inspired our leaders to think of shaping a system based on social and economic equality. All these factors contributed to the framing of our Constitution.