Mathematics Question from JEE Main 2023 · 10 April, Shift 1

Let the ellipse E: $x^2 + 9y^2 = 9$ intersect the positive $x$- and $y$-axes at the points A and B respectively. Let the major axis of E be a diameter of the circle C. Let the line passing through A and B meet the circle C at the point P. If the area of the triangle with vertices A, P, and the origin O is $m/n$, where $m$ and $n$ are coprime, then $m - n$ is equal to: