Consider the given figure showing the formation of ${\mathrm{H}}_2^{+}$ ion depending on internuclear distance versus potential energy of the system.

 

Which is correct statement

Curve-I represents the most stable of the system for ${\mathrm{H}}_2^{+} \mathrm{ion}$

Curve-2 represents the most stable state of the system for ${\mathrm{H}}_2^{+} \mathrm{ion}$

Curve-1 indicates that the molecular hydrogen ion is formed

Curve-2 represents the energy level of the antibonding region