The correct answer is: C. 1946
The Quit Kashmir Movement was a popular uprising in the princely state of Jammu and Kashmir in 1946. The movement was led by Sheikh Mohammad Abdullah, who demanded that the Maharaja of Jammu and Kashmir, Hari Singh, abdicate and that the state be merged with India. The movement was successful in forcing the Maharaja to abdicate, and in 1947, Jammu and Kashmir acceded to India.
Option A: 1942 is incorrect because the Quit India Movement was a nationwide movement in India that was launched in 1942. The movement was led by Mahatma Gandhi and called for the British to quit India.
Option B: 1947 is incorrect because the Partition of India took place in 1947. The Partition was the division of British India into two independent dominions, India and Pakistan.
Option D: 1950 is incorrect because the Indian Constitution was adopted in 1950. The Constitution of India is the supreme law of India.