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If a variable line has its intercepts on the coordinate axes `ea n de^(prime),` where `e/2a n d e^(prime/)2` are the eccentricities of a hyperbola and its conjugate hyperbola, then the line always touches the circle `x^2+y^2=r^2,` where `r=` 1 (b) 2 (c) 3 (d) cannot be decided

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