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If three points `(0,\ 0),\ (3,\ sqrt(3))` and `(3,\ lambda)` form an equilateral triangle, then `lambda=` (a) 2 (b) `-3` (c) `-4` (d) None of these

A

`-4`

B

2

C

`-3`

D

`pm sqrt(3)`

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The correct Answer is:
D
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