सैफटी लैंप के आविष्कारक है – McqOptions

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1.	सैफटी लैंप के आविष्कारक हैं-
A.	रोएंटजैन
B.	डेवी
C.	मार्कोनी
D.	शोल्स
Answer» C. मार्कोनी

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