Given,

496÷0.6×0.5=?

It can be approximated as

$$\begin{gathered} =\frac{4960}{6}\times 0.5 \\ =\frac{4960}{6}\times \frac{1}{2} \\ =826.66\times \frac{1}{2} \\ =826\times \frac{1}{2}=413 \end{gathered}$$

Hence, Option A is correct.