The large and shield-shaped cotyledon in maize seed is

Identity $\mathrm{A}$, $\mathrm{B}$, and $\mathrm{C}$ in the given figure:

 Generally, monocotyledonous seeds are ($\mathrm{A}$) but some as in ($\mathrm{B}$) are ($\mathrm{C}$).

Identify ($\mathrm{A}$), ($\mathrm{B}$) and ($\mathrm{C}$):