There are 2n points in a plane in which m are collinear. Number of quadrilateral formed by joining these lines
A. is equal to `.^(2n)C_(4)-.^(m)C_(4)`
B. is greater than `.^(2n)C_(4)_.^(m)C_(4)`
C. is less than `.^(2n)C_(4)-.^(m)C_(4)`
D. None of these