In FEM, if x, y represents Cartesian coordinates, then which term of Pascal’s triangle corresponds to the position of the interior node of the following element?

In FEM, if x, y represents Cartesian coordinates, then which term of

1.	In FEM, if x, y represents Cartesian coordinates, then which term of Pascal’s triangle corresponds to the position of the interior node of the following element?
A.	1
B.	xy
C.	x2y
D.	xy2
Answer» C. x2y