[ 4^3 × 5^4 ] ÷ 4^5 = ?

Answer: Option D

$$\begin{array}{rl}& \frac{4^3\times 5^4}{4^5}\\ & =\frac{5^4}{4^{\left(5-3\right)}}\\ & =\frac{5^4}{4^2}\\ & =\frac{625}{16}\\ & =39.0625\end{array}$$