Answer:
Article VI
Step-by-step explanation:
Clause 2 of Article VI of the U.S Constitution, also referred to as the Supremacy Clause, establishes the U.S. Constitution and "and all treaties made, or which shall be made" as the Supreme Law of the Land, therefore, all states, federal officers and judges are bound by the Constitution, meaning that in case of a conflict between a state law and a federal law, the latter is the one that should prevail.