(A) 18 October 1945
(B) 11 October 1946
(C) 26 October 1947
(D) 29 October 1948
🧠 Explanation:
The Instrument of Accession was signed by the Maharaja of Kashmir on 26th October 1947, during a critical period of conflict and political uncertainty. Faced with an invasion by tribal militias and the need for military assistance, the Maharaja chose to accede to India to secure protection and maintain sovereignty. This decision was pivotal in shaping the future of Kashmir and its political status. The signing allowed Indian forces to enter the region, leading to the first Indo-Pak war over Kashmir. The accession remains a significant historical and political event, influencing the complex relations between India, Pakistan, and Kashmir to this day.