Concept:The Swaraj flag was designed by Mahatma Gandhi in 1921 as a symbol of national unity and self-reliance.Explanation:Gandhi designed a tricolour flag with red, green, and white bands. It had a spinning wheel (charkha) in the centre, representing the ideal of self-help. This flag became a powerful symbol of defiance and collective belonging during the freedom struggle. It helped promote feelings of nationalism among Indians.(Note: An earlier flag used during the Swadeshi movement had different colours and symbols.)Answer:A. Mahatma Gandhi