HomeUPSCThe murder of Archduke Francis Ferdinand of ……and his wife, on June 28, 1914, by a fanatical Serbian student in Sarajevo (Bosnia) was the spark that set the World War off. 57. The murder of Archduke Francis Ferdinand of ……and his wife, on June 28, 1914, by a fanatical Serbian student in Sarajevo (Bosnia) was the spark that set the World War off.By Admin / October 4, 2025 A. austria B. czechoslovakia C. hungary D. china ✅ The correct answer is option A.