World Geography
The phosphate are a group of minerals of one or more metallic elements chemically associated with the phosphate compound ____

carbonates
phosphates
silicates
oxides

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World Geography
The sidereal month may be defined as

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
the period in which the moon completes an orbit around the earth

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