Statement-1: ${\mathrm{Ce}}^{4+}$ is more stable than ${\mathrm{Ce}}^{3+}$. 

Statement-2: ${\mathrm{Ce}}^{4+}$ has noble gas configuration

Statement-1 is true, Statement -2 is false.

Statement-1 is false, Statement -2 is true

Statement-1 is True, Statement-2 is True, Statement-2
is NOT a correct explanation for Statement-1

Statement-1 is True, Statement-2 is True; Statement-2
is a correct explanation for Statement-1