$\begin {array} {1 1} (A)\;Foci : (0, \pm \sqrt{21} ), vertices : (0, \pm 5), length \: of \: the \: major \: axis = 10, length \: of \: the \: minor\: axis = 4, eccentricity = \large\frac{\sqrt{21}}{5}, length \: of \: the \: latus \: rectum = \large\frac{8}{5}, axis \: major \: axis \: along \: y - axis \\ (B)\;Foci : ( \pm \sqrt{21} , 0), vertices : ( \pm 5, 0), length \: of \: the \: major \: axis = 10, length \: of \: the \: minor\: axis = 4, eccentricity = \large\frac{\sqrt{21}}{5}, length \: of \: the \: latus \: rectum = \large\frac{8}{5}, axis \: major \: axis \: along \: x - axis \\ (C)\;Foci : (0, \pm 2\sqrt{21} ), vertices : (0, \pm 5), length \: of \: the \: major \: axis = 10, length \: of \: the \: minor\: axis = 4, eccentricity =2 \large\frac{\sqrt{21}}{5}, length \: of \: the \: latus \: rectum = \large\frac{16}{5}, axis \: major \: axis \: along \: y - axis \\ (D)\;Foci : ( \pm 2\sqrt{21}, 0 ), vertices : ( \pm 5, 0), length \: of \: the \: major \: axis = 10, length \: of \: the \: minor\: axis = 4, eccentricity = \large\frac{2\sqrt{21}}{5}, length \: of \: the \: latus \: rectum = \large\frac{16}{5}, axis \: major \: axis \: along \: x - axis \end {array}$