अल्फ्रेड नोबेल ने किसका आव – McqOptions

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1.	अल्फ्रेड नोबेल ने किसका आविष्कार किया -
A.	माइक्रोफोन
B.	टाइपराइटर
C.	डायनामाइट
D.	ग्रामोफोन
Answer» D. ग्रामोफोन

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