जेट इंजन का आविष्कार किसने – McqOptions

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1.	जेट इंजन का आविष्कार किसने किया?
A.	सर फ्रैंक व्हिटेल
B.	गोटलिब डेमलर
C.	रोजर बेकन
D.	लुईस ई। वाटरमैन
Answer» B. गोटलिब डेमलर

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