CAT 2025 LR — Previous Year Question

If the triangle represents doctors, the circle represents teachers, and the rectangle represents film-makers in the following diagram, then which numbers represent teachers who are neither doctors nor film-makers?

(A circle overlaps a rightward-pointing triangle and a large rectangle. Regions: 5 = circle only (top, above the rectangle's edge and left of the triangle) = teachers only; 2 = circle only (below 5, still above the rectangle's top edge, left of the triangle) = teachers only; 7 = circle ∩ triangle only = teachers+doctors; 8 = triangle only = doctors only; 3 = circle ∩ rectangle only (below the rectangle's top edge) = teachers+film-makers; 4 = triangle ∩ rectangle only = doctors+film-makers; 9 = rectangle only = film-makers only.)