Solution
Smaller triangles = 6
Triangles formed with 1 triangle and 1 quadrilateral = 1
Triangles formed with combination of 2 triangles = 4
Triangles formed with combination of 3 triangles = 1
Triangles formed with 3 triangles and 1 quadrilateral = 1
Thus, total triangles = 6 + 1 + 4 + 1 + 1 = 13
=> Ans - (D)
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