I. Maharaja Hari Singh signed the Instrument of Accession.
II. Constitution of India was enforced.
III. Accession to India ratified by the Sovereign Constituent Assembly of Jammu and Kashmir.
IV. New Constitution of the State of Jammu and Kashmir came into force.
Correct Answer: (c) I, II, III, IV
Solution:Maharaja Hari Singh signed the instrument of instruction on 26 October, 1947. The Constituion of India was enforced on 26 November, 1950. Accession to India was ratified by the sovereign constituent Assembly of Jammu and Kashmir on 17 November, 1956, and new constitution of the state of Jammu and Kashmir came into force on 26 January, 1957.