Explanation:

- The design of the National Flag of India was indeed adopted by the Constituent Assembly of India.

- This significant event took place in July 1947.

- The flag features three horizontal stripes of deep saffron, white, and dark green with the Ashoka Chakra in navy blue at its center.

- It became an emblem of freedom during the struggle for India’s independence.

- Option 1: July, 1947: ?? This is the correct answer.

- Option 2: August, 1947: This is incorrect. It was adopted in July.

- Option 3: July, 1948: Incorrect; the flag was adopted in 1947.

- Option 4: July, 1950: Incorrect; the adoption happened earlier.