फ्रैंक व्हिट ने क्या आविष् – McqOptions

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1.	फ्रैंक व्हिट ने क्या आविष्कार किया?
A.	राडार
B.	एथिल गैसोलीन
C.	सोनार
D.	जेट इंजन
Answer» E.

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