Find the correct order of the given elements with respect to their size.

Which of the following ions indicates the maximum magnetic moment?

The correct statement$(s)$ about $Cr^{2+}$ and $Mn^{3+}$ is(are)
[Atomic numbers of $Cr = 24$ and $Mn = 25$]
$(A)$ $Cr^{2+}$ is a reducing agent
$(B)$ $Mn^{3+}$ is an oxidizing agent
$(C)$ Both $Cr^{2+}$ and $Mn^{3+}$ exhibit $d^4$ electronic configuration
$(D)$ When $Cr^{2+}$ is used as a reducing agent,the chromium ion attains $d^3$ electronic configuration

In context with the transition elements,which of the following statements is incorrect?

Which elements of the first transition series have higher ionization enthalpy values than their neighboring elements?

The element having general electronic configuration $3d^4 4s^1$ is