Answer:
For the purpose of making laws, the subjects are divided into three lists :
(i) Union List : It includes subjects over which only the union government can make laws,
e.g.–defence, foreign affairs, currency etc.
(ii) State List : It contains those subjects over which the state governments have the powers
to make the laws, e.g. police, trade, irrigation, agriculture etc.
(iii) Concurrent List : It contains those subjects over which both the central and the state governments can make the laws but in case of a clash, it is the laws made by the Central government which will prevail.