भारत सरकार अधिनियम, 1919 के तहत प्रथम केंद्रीय विधान सभा का गठन किस वर्ष किया गया था?

In which year did the offices of Speaker and Deputy Speaker originate in India under the provisions of the Government of India Act, 1919?

The landmark Constitution (Application to Jammu and Kashmir) Order, 1954, which systematically extended various provisions of the Indian Constitution to the state, was promulgated by the President under which specific clause of Article 370?