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Area of ellipse x^2/a^2 + y^2/b^2 = 1, a...

Area of ellipse `x^2/a^2 + y^2/b^2 = 1, a > b` is :

A

`pi ab` Sq. units

B

`1/2 pi ab` Sq. units

C

`1/4 pi ab` Sq. units

D

None of these

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