What percentage or all water available on the Earth is contained in the oceans?
A. 50%
B. 70%
C. 86%
D. 97%
Answer: Option D
A. 50%
B. 70%
C. 86%
D. 97%
Answer: Option D
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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