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The diameter of the circle concentric to...

The diameter of the circle concentric to the circle `x^(2) + y^(2) + 4x - 2y = 20` and passes through the origin is -

A

10 unit

B

`sqrt(20)` unit

C

`sqrt(5)` unit

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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