The Order and Degree of the Differential Equation $\frac { d y } { d x } = - \frac { x } { y }$

The order and degree of the differential equation $\frac { d y } { d x } = - \frac { x } { y }$ are

A) 1;1
B) 1;2
C) 2;1
D) 2;2
E) 1;3