Concept:The Swaraj flag was designed by Mahatma Gandhi in 1921 as a symbol of India's self-rule movement.Explanation:The Swaraj flag, introduced by Mahatma Gandhi in 1921, was a tricolour (red, green and white) with a spinning wheel in the centre. The spinning wheel represented the Gandhian ideal of self-help and economic independence. This flag became a powerful symbol of collective belonging and nationalistic spirit during the freedom struggle. It is distinct from earlier flags like the one used during the Swadeshi movement in Bengal (red, green, yellow with eight lotuses and a crescent moon).Answer:The correct option is A. Mahatma Gandhi.