The correct answer is: A. August 15, 1947
The national flag of India was adopted by the Constituent Assembly of India on August 15, 1947, the day India gained independence from British rule. The flag is a horizontal tricolor of deep saffron (kesaria) at the top, white in the middle and dark green at the bottom, with a navy blue wheel (chakra) in the center of the white band. The wheel has 24 spokes and represents the wheel of the law of dharma. The flag is a symbol of national pride and unity for the people of India.
Option B is incorrect because the flag was adopted on August 15, 1947, not July 22, 1947.
Option C is incorrect because the flag was adopted on August 15, 1947, not January 26, 1950.
Option D is incorrect because the flag was adopted on August 15, 1947, not January 2, 1950.