Observe the following reaction
I. $\mathrm{CO}(\mathrm{g})+\mathrm{H}_2(\mathrm{~g}) \xrightarrow{X} \mathrm{HCHO}(\mathrm{g})$
II. $\mathrm{CO}(\mathrm{g})+3 \mathrm{H}_2(\mathrm{~g}) \xrightarrow{\gamma} \mathrm{CH}_4(\mathrm{~g})+\mathrm{H}_2 \mathrm{O}(\mathrm{g})$
The catalysts $X$ and $Y$ in the above reactions are respectively
- A
$\mathrm{Cu}, \mathrm{Cu}$
- B
$\mathrm{Ni}, \mathrm{Ni}$
- C
$\mathrm{Cu}, \mathrm{Ni}$
- D
$\mathrm{Ni}, \mathrm{Cu}$
✓ Correct answer: C
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