JEE Advanced 2018 Paper 1

Let S be the circle in the xy-plane defined by the equation x2+y2=4

Let ܲ be a point on the circle ܵS with both coordinates being positive. Let the tangent to ܵS at P ܲ intersect the coordinate axes at the points M and ܰN. Then, the mid-point of the line segment MN ܰmust lie on the curve