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# The angle between the curves $y^2=4x+4$ and $y^2=36(9-x)$ is

$\begin {array} {1 1} (1)\;30^{\circ} & \quad (2)\;45^{\circ} \\ (3)\;60^{\circ} & \quad (4)\;90^{\circ} \end {array}$

(5) $90^{\circ}$