When can the Parliament legislate on a subject in the state list?

• A.  If the Parliament passes a resolution to that effect in the national interest.
• B.  If the Supreme Court grants necessary authority to the Parliament.
• C.  If the Rajya Sabha passes a resolution by two-thirds majority declaring that the subject in the state list under consideration is of national importance.
• D.  If the President issues an ordinance transferring the subject from the state list to the union or the concurrent lists.