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Two lines intersect at O. points `A_(1),A_(2), . . .A_(n)` are taken on one of them and `B_(1),B_(2), . . .,B_(n)` on the other, the number of triangle that can be drawn with the help of these (2n+1) points are:

A

n

B

`n^2`

C

`n^3`

D

`n^4`

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The correct Answer is:
C
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