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In a Delta ABC " if " |(1,a,b),(1,c,a),(...

In a `Delta ABC " if " |(1,a,b),(1,c,a),(1,b,c)| =0`, then `sin^(2) A + sin^(2) B + sin^(2) C` is

A

`(3sqrt(3))/2`

B

`5/4`

C

`9/4`

D

`2`

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The correct Answer is:
A
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