(द) सेफ्टी लैंप का अविष्कार किया था -
।
(i) इब्राहिम डब
(iii) हेनरी कॉर्ट
विन डी
1 हफ्री डेवी
(iv) जॉन स्टोकसन
इमली डेवी ।
Answers
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The answer is जॉन स्टोकसन
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chaudhary9620:
answer sahi he
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