Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

${\mathrm{Fe}}_3{\mathrm{O}}_4$ is obtained when iron is reacted with steam for a prolonged time. Iron do not react with cold water. When red hot iron is made to react with steam ${\mathrm{Fe}}_3{\mathrm{O}}_4$ is produced.

$3\mathrm{Fe}\left(\mathrm{s}\right)+4{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\to {\mathrm{Fe}}_3{\mathrm{O}}_4\left(\mathrm{s}\right)+4{\mathrm{H}}_2\left(\mathrm{g}\right)$