The correct answer is (a) The Union List.
The Union List is a list of subjects that are under the exclusive jurisdiction of the Parliament of India. The states cannot make laws on any of the subjects in the Union List.
The State List is a list of subjects that are under the exclusive jurisdiction of the state legislatures. The Parliament of India cannot make laws on any of the subjects in the State List.
The Concurrent List is a list of subjects that are under the concurrent jurisdiction of the Parliament of India and the state legislatures. The Parliament of India and the state legislatures can both make laws on the subjects in the Concurrent List.
The Union List includes subjects such as defence, foreign affairs, railways, currency, and banking. The State List includes subjects such as police, public order, local government, education, and agriculture. The Concurrent List includes subjects such as criminal law, marriage and divorce, contracts, and torts.