Question 11 Mark$($Igor Ivanovich Sikorsky, Sir Alexander Fleming$)$ AnswerSir Alexander FlemingView full question & answer→
Question 31 Mark$($Sir Alexander Fleming, Michael Faraday$)$ AnswerMichael FaradayView full question & answer→
Question 51 Mark$($Sir Frank Whittle, Sir Alexander Fleming$)$ AnswerSir Frank WhittleView full question & answer→
Question 61 Mark$($Michael Faraday, Guglielmo Marconi$)$ AnswerGuglielmo MarconiView full question & answer→
Question 71 Mark$($Sir Frank Whittle, Igor Ivanovich Sikorsky$)$ AnswerIgor Ivanovich SikorskyView full question & answer→
Question 81 Mark$($Ladislao Biro, Guglielmo Marconi$)$ AnswerLadislao BiroView full question & answer→