Which of the following oxides has the maximum basicity?

The transition elements have a characteristic electronic configuration which can be represented as:

Which element from the following exhibits a common oxidation state of $+2$ only?

Which of the following is more paramagnetic?

Number of electrons in the penultimate shell of $d-$block elements.

Given below are two statements:
Statement $I$: $Cr^{2+}$ is oxidising and $Mn^{3+}$ is reducing in nature.
Statement $II$: $Sc^{3+}$ compounds are repelled by the applied magnetic field.
In the light of the above statements,choose the most appropriate answer from the options given below: