The highest coal-producing country in the world is
A. India
B. USA
C. China
D. Russia
Answer: Option C
A. India
B. USA
C. China
D. Russia
Answer: Option C
The years 1700, 1800 and 1900 were
A. Leap years
B. Not leap years
C. Famine years
D. Years of natural calamities
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