An ellipse is drawn by taking a diameter of the circle $(x-1)^{2}+y^{2}=1$ as its semi-minor axis and a diameter of the circle $x^{2}+(y-2)^{2}=4$ as its semi-major axis. If the centre of the ellipse is the origin and its axes are the coordinate axes, then the equation of the ellipse is\\
(1) $4x^{2}+y^{2}=4$\\
(2) $x^{2}+4y^{2}=8$\\
(3) $4x^{2}+y^{2}=8$\\
(4) $x^{2}+4y^{2}=16$