If all of the diagonals are drawn from a vertex of a hexagon, how many triangles are formed?
2, 3, 4, 5

Solution:

Answer is 4.

If all of the diagonals are drawn from a vertex of a hexagon, how many triangles are formed?
2, 3, 4, 5

Summary:

If all of the diagonals are drawn from a vertex of a hexagon, 4 triangles are formed. Hence, third option is correct.