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Given that a^(2) + b^(2) =1, c^(2) + d^(...

Given that `a^(2) + b^(2) =1, c^(2) + d^(2) = 1, p^(2) + q^(2) =1`, where `a,b, c,d,p,q` are all real numbers, then

A

`ab + cd + pq ge 1`

B

`ab + cd + pq ge 3`

C

`ab + cd + pq lt 3`

D

`ab + cd + pq le (3)/(2)`

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