Question

Which of the incorporation doctrine is true

Answer 1

There are several incorporation doctrines, so it depends on which specific doctrine you are referring to. However, one commonly accepted doctrine is the "Selective Incorporation" doctrine. This doctrine holds that the provisions of the Bill of Rights apply to the states through the Due Process Clause of the Fourteenth Amendment, but not all provisions of the Bill of Rights have been incorporated. The Supreme Court has selectively incorporated various provisions on a case-by-case basis over time.