World Geography
What is a submerged ridge rising from the bed of water to near surface called?

Tor
Hogback
Shoal
Backswamp

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World Geography
The sidereal month may be defined as

the period in which the moon completes an orbit around the earth
None of these
the period of rotation of moon
the period in which the moon completes an orbit around the Earth and returns to the same position in the sky

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