Observe the following reactions I. $\mathrm{CO}(g)+\mathrm{H}_2(g) \xrightarrow{\mathrm{X}} \mathrm{HCHO}(g)$ II. $\mathrm{CO}(g)+3 \mathrm{H}_2(g) \xrightarrow{\mathrm{Y}} \mathrm{CH}_4(g)+\mathrm{H}_2 \mathrm{O}(g)$ The catalysts X and Y in the above reactions are respectively

• A

  $\mathrm{Cu}, \mathrm{Cu}$
• B

  $\mathrm{Ni}, \mathrm{Ni}$
• Correct answer
  C

  $\mathrm{Cu}, \mathrm{Ni}$
• D

  $\mathrm{Ni}, \mathrm{Cu}$

Hence, the correct answer is option: 'C'.