World Geography
The longest ship canal in the world is the

Panama canal, Central America
Kiel canal, Germany
Suez canal, Egypt
St. Laurence Seaway (USA and Canada)

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

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