The correct answer is C. both union and concurrent list.
The Parliament enjoys legislative power over subjects in both the Union List and the Concurrent List. The Union List contains subjects of national importance, such
as defence, foreign affairs, and currency. The Concurrent List contains subjects of common interest to both the Union and the States, such as education, criminal law, and marriage and divorce.The Parliament has exclusive power to make laws on subjects in the Union List. The States have exclusive power to make laws on subjects in the State List. However, the Parliament also has power to make laws on subjects in the Concurrent List, if the Rajya Sabha passes a resolution to that effect.
The Parliament’s power to make laws on subjects in the Concurrent List is subject to the power of the States to make laws on the same subjects. If a law made by the Parliament on a subject in the Concurrent List conflicts with a law made by a State on the same subject, the law made by the Parliament prevails.
The Parliament’s power to make laws on subjects in the Concurrent List is also subject to the power of the courts to strike down laws that are unconstitutional. The courts can strike down a law made by the Parliament on a subject in the Concurrent List if it finds that the law is not in accordance with the Constitution.