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The area of the triangle whose vertices ...

The area of the triangle whose vertices are A = (1,-1,2), B= (2,1,-1) and C = (3,-1,2) is

A

`4sqrt5 sq. units`

B

`2sqrt3 sq. units`

C

`sqrt13 sq. units`

D

`sqrt15 sq. units`

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The correct Answer is:
C
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