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In a three dimensional co-odinate , P, Q...

In a three dimensional co-odinate , P, Q and R are images of a point `A(a, b, c)` in the xy, yz and zx planes, respectively. If G is the centroid of triangle PQR, then area of triangle AOG is (O is origin)

A

0

B

`a^2+b^2+c^2`

C

`(2)/(3)(a^2+b^2+c^2)`

D

None of these

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(a)
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