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If the equal sides AB and AC (each equal to 5 units) of a right-angled isosceles triangle ABC are produced to P and Q such that `BP cdot CQ = AB^(2)`, then the line PQ always passes through the fixed point (where A is the origin and AB, AC lie along the positive x and positive y - axis respectively)

A

a,0

B

0,a

C

a,a

D

none of the above

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