80वाँ संविधान संशोधन अधिनियम (करों के हस्तांतरण की वैकल्पिक योजना) किस तिथि से पूर्वव्यापी प्रभाव से लागू माना गया था?

Under which list of the Seventh Schedule of the Constitution of India does 'Economic and Social Planning' fall?

Which Article of the Indian Constitution, which was abrogated in 2019, had provided special status to the erstwhile state of Jammu and Kashmir?