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The $\Delta H_f^o$ for $CO_2 (g), CO(g)$ and $H_2O (g)$ are $-393.5, -110.5$ and $-241.8\, kJ\, mol^{-1}$ respectively. The standard enthalpy change (in $kJ$) for the reaction $CO_2 (g) + H_2 (g) \to CO (g) + H_2O (g)$ is

• A
  $524.1$
• ✓
  $41.2$
• C
  $-262.5$
• D
  $-41.2$