Question

explain the 3 fold distribution of legislative power between the union government and state government

Answer 1

Union List: It includes subjects of national importance such as defence of the country, foreign affairs, banking, communications and currency. They are included in this list because we need a uniform policy on these matters throughout the country.
State List: The list contains subjects of state and local importance such as police, trade, commerce, agriculture and irrigation. The state governments alone can make laws relating to the subjects mentioned in the state list.
Concurrent List: Includes subjects of common interest to both, the Union government as well as the State government such as education, forests, trade unions, marriage, adoption and succession. Both the Union as well as State governments can make laws on the subjects mentioned in this list. If their laws conflict with each other, the law made by the Union government prevails.

Answer 2

This is your answer.