The correct options are
A 1950 - Constitution came into force
B 1951 - India's first general election
The Constitution came into force in the year 1950. In 1951, India saw its first General Election, where voters from across the country chose their representatives. In 1952, the Parliament Building saw the first sitting of the two chambers: the Lok Sabha and the Rajya Sabha. The system of having two chambers in the legislature is called ‘bicameralism’.