Let $a, \; b, \; c \in R$. If $f(x) = ax^2 + bx + c$ is such that $a + b + c = 3$ and $f(x+y) = f(x) + f(y) + xy, \forall x, y \in R$, then $\displaystyle\sum_{n=1}^{10} f(n)$ is equal to

Question

( A ) 330
( B ) 190
( C ) 225
( D ) 165