Correct option is D
The correct answer is (d) When the Rajya Sabha passes a resolution
Explanation:
• Article 249 empowers Parliament to legislate on State List matters.
• This happens when Rajya Sabha passes a resolution.
• Resolution must be supported by two-thirds majority.
• It must declare national interest.
• Therefore, option (d) is correct.
Information Booster:
• Such a law remains valid for one year.
• It can be extended by further resolutions.
Additional Knowledge (Incorrect Options):
• Governor request – No such constitutional provision.
• National Emergency – Covered separately under Article 250.
• Presidential proclamation alone – Not sufficient without Parliament.