$y=e^{a \sin ^{-1}x}=>(1-x^2)y_{n+2}-(2n+1)xy_{n+1}=$

Question

$$\begin {array} {1 1} (1)\;-(n^2+a^2)y_n & \quad (2)\;(n^2+a^2)y_n \\ (3)\;(n^2+a^2)y_n & \quad (4)\;-(n^2-a^2)y_n \end {array}$$