Ans: D
$\begin{array}{cl}
& 14\times 16^{15} +17 \times 16^{14} +16^2 + 17 \\
= & 14 \times 16^{15} +(16+1) \times 16^{14} +16^2 +16 +1 \\
= & 14\times 16^{15} +16^{15} +16^{14} +16^2 +16 + 16^0 \\
= & 15\times 16^{15} +16^{14} +16^2 +16 + 16^0 \\
= & \text{F}\ 100\ 000\ 000\ 000\ 111_{16}
\end{array}$
