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If the centroid of tetrahedron OABC wher...

If the centroid of tetrahedron OABC where A ,B, C are given by (a, 2, 3) ,(1 ,b, 2) and (2, 1, c) respectively is (1, 2, -1) then distance of P(a, b, c) from origin is

A

`sqrt""(107)`

B

`sqrt""(14)`

C

`sqrt""(170//14)`

D

None of these

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The correct Answer is:
A
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