If the hyperbolas x2 - y2 = a2 and xy = c2 are of equal size, then

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If the hyperbolas x2 - y2 = a2 and xy = c2 are of equal size, then

Options:

A . c2 = 2a2

B . c = 2a

C . 2c2 = a2

D . none of these

Answer: Option C

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