संविधान सभेने भारतीय राष्ट्रीय ध्वजाची रचना ________ रोजी स्विकारली.

The correct answer is Option C (22nd July, 1947).

Key Points:
• The Constituent Assembly adopted the National Flag of India on July 22, 1947.
• Option 1 refers to December 9, 1946, which was the date of the first meeting of the Constituent Assembly.
• Option 2 refers to January 22, 1947, when the Objectives Resolution moved by Jawaharlal Nehru was adopted.
• Option 4 refers to August 14, 1947, midnight session just prior to Indian independence.
• The National Flag design was based on Pingali Venkayya's tricolor.
• Key Takeaway: National Flag was adopted on 22nd July 1947; Objectives Resolution was adopted on 22nd January 1947.