${\mathrm{N}}_2\left(\mathrm{g}\right)+3{\mathrm{H}}_2\left(\mathrm{g}\right)⟶2{\mathrm{NH}}_3\left(\mathrm{g}\right)$. Identify dihydrogen (H₂) as a limiting reagent in the following reaction mixtures

${\text{N}}_{\text{2}}{\text{\hspace{0.17em}+\hspace{0.17em}3H}}_{\text{2}}\stackrel{ }{\to }{\text{\hspace{0.17em}2NH}}_{\text{3}}$ 
1mole  3mole
28gm$\stackrel{ }{\to }$ 6gm
6gm$\stackrel{ }{\to }$?
$\frac{\text{56}}{\text{28}}\text{\hspace{0.17em}×\hspace{0.17em}6\hspace{0.17em}=\hspace{0.17em}12}$ of H₂ is required
H₂ is there less quantity in a given option