India attained `Dominion Status` on 15th August, 1947. Dominion status refers to a country`s status within the British Commonwealth. It meant that India, while still a part of the British Commonwealth, was granted self-governance and had the power to make its own laws and decisions. However, it still recognized King George VI as its head of state. This marked a significant milestone in India`s struggle for independence, as it signaled the transfer of power from the British Raj to the Indian leadership.

Option 1 (15th January, 1947) is incorrect because India did not attain Dominion Status on this date. Option 3 (15th August, 1950) is incorrect because this is the date when India officially became a republic and adopted its constitution. Option 4 (15th October, 1947) is incorrect because India had already attained Dominion Status by this date. Therefore, the correct answer is option 2 (15th August, 1947), as this is the date when India attained Dominion Status.