if the ellipse is confocal x² + y²k² = k²a² with the hyperbola x²-y² = a² (k>1). then which of the following statement(s) is/are correct?
a. ratio of eccentricities of ellips and hyperbola is 1/√3
b. ratio of major axis of ellips and transverse axis of hyperbola is √3
c. ratio of major axis of ellips and conjugate axis of hyperbola is √3
d. ratio of length if latus rectum of ellipse and hyperbola is 1/√3