Constitution: Written,Unwritten , Rigid, flexible, Federal,Unitary. Democracy: Parliamentary and Presidential. Historical Backgorund: Regulating Act, 1773, Pitts Act, 1784, Charter Act 1793, Charter Act 1813, Charter Act, 1833 Charter Act , Charter Act 1853, Government of India Act, 1858, Indian Council Act, 1861, Indian Council Act, 1892, Indian Council Act, 1909, Government of India Act, 1919, Government of India Act, 1935. Preamble, Making of Indian Constitution