If $\sum _ { r = 1 } ^ { 25 } \frac { r } { r ^ { 4 } + r ^ { 2 } + 1 } = \frac { p } { q ^ { \prime } }$, where $p$ and $q$ are coprime positive integer, then $\mathrm { p } + \mathrm { q }$ is equal to (A) 841 (B) 984 (C) 976 (D) 890