ABCD is a convex quadrilateral and 3, 4,...

ABCD is a convex quadrilateral and 3, 4, 5, and 6 points are marked on the sides AB, BC, CD, and DA, respectively. The number of triangles with vertices on different sides is

A

270

B

220

C

282

D

None of these

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The correct Answer is:

D

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