If the common chord of the circles x^(2)...

If the common chord of the circles `x^(2) + ( y -lambda)^(2) =16` and `x^(2) +y^(2) =16` subtend a right angle at the origin then `' lambda'` is equal to `:`

A

4

B

`2 sqrt( 2)`

C

`+- 4sqrt( 2)`

D

8

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The correct Answer is:

C

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