Which of the following reactions increases production of dihydrogen from synthesis gas?

• A

  ${\mathrm{CH}}_4\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\underset{\mathrm{Ni}}{\overset{1270\mathrm{K}}{\to }}\mathrm{CO}\left(\mathrm{g}\right)+3{\mathrm{H}}_2\left(\mathrm{g}\right)$

• B

  $\mathrm{C}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\stackrel{1270\mathrm{K}}{\to }\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

• C

  $\mathrm{CO}\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)\underset{\mathrm{Catalyst}}{\overset{673\mathrm{K}}{\to }}{\mathrm{CO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

• D

  ${\mathrm{C}}_2{\mathrm{H}}_6+2{\mathrm{H}}_2\mathrm{O}\underset{\mathrm{Ni}}{\overset{1270\mathrm{K}}{\to }}2\mathrm{CO}+5{\mathrm{H}}_2$