How does iron react with chlorine?

Identify the correct option to complete the following equation:

$2\mathrm{Fe}\left(\mathrm{s}\right)+3{\mathrm{Cl}}_2\left(\mathrm{g}\right)\to \underset{}{2\_\_\_\_\_\left(\mathrm{s}\right)}$

Complete the following equation:

$4\mathrm{Fe} + 3{\mathrm{O}}_2 + {\mathrm{H}}_2\mathrm{O}\to$$2$ _____.

$\mathrm{A}$: ${\mathrm{O}}_2$

$\mathrm{B}$: ${\mathrm{Fe}}_3{\mathrm{O}}_4$

$\mathrm{C}$: $\mathrm{FeO}$

$\mathrm{D}$: ${\mathrm{Fe}}_2{\mathrm{O}}_3.{\mathrm{H}}_2\mathrm{O}$

Enter your correct answer as $\mathrm{A}, \mathrm{B}, \mathrm{C} \mathrm{or} \mathrm{D}$.

Which phenomenon is being depicted in the given picture? Write the chemical equation for that.