In hazardous area of gassy mines, material transportation is done by vehicles powered by
A. A.C. mains
B. D.C. mains
C. I.C. engines
D. batteries
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Answer: D
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In hazardous area of gassy mines, material transportation is done by vehicles powered by
A. A.C. mains
B. D.C. mains
C. I.C. engines
D. batteries
Answer: D
Share your understanding of this question with the correct explanation.