Answer:
2) an isosceles triangle
Explanation:
Given that the diagram shows a cone and its axis of rotation.
A plane passes through the axis of rotation,
Then the image formed would be an isosceles triangle.
It cannot be a circle because only if plane passes perpendicular to axis of rotation circle will be formed
If plane is parallel to axis of rotation then parabola would be formed
If a plane making an angle not 90 cuts axis of rotation then an oval would be formed
So correct answer is option 2)
an isosceles triangle