The Gutenburg discontinuity separates ________.
A. Sial and Sima
B. Lithosphere and outer mantle
C. Outer mantle and inner mantle
D. Inner mantle and the core
Answer: Option D
A. Sial and Sima
B. Lithosphere and outer mantle
C. Outer mantle and inner mantle
D. Inner mantle and the core
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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