Radii of director circles of curves `(x^(2))/(a^(2))+(y^(2))/(b^(2))=1` and `(x^(2))/(a^(2))-(y^(2))/(b^(2))=1` are 2er and r, respectively. If `e_(1)` and `e_(2)` are the eccentricities of ellipse and hyperbola, respectively, then `4e_(2)^(2)-e_(1)^(2)=`__________.

Options

A. 2
B. 4
C. 6
D. 8

Answer

C