3. Awarded by the Emperor/Empress of India between 1900 and 1947, to "any person without distinction of race, occupation, position, or sex ... who shall have distinguished himself (or herself) by important and useful service in the advancement of the public interest in India", this award's (medal) name translates as "Emperor of India" in Hindustani language. Mahatma Gandhi who was awarded the medal in 1915 by The Lord Hardinge of Penshurst for his contribution to ambulance services in South Africa later returned the medal in 1920 as a part of the national campaign protesting the Jallianwala Bagh massacre and in support of the Khilafat Movement. Which medal?