The number of oxidation states exhibited by manganese $(Mn)$ is

Match the statements given in List-$I$ with the oxidation states given in List-$II$:

List-$I$	List-$II$
$A$. Oxidation state of $Mn$ in $MnO_2$	$i$. $+2$
$B$. Most stable oxidation state of $Mn$	$ii$. $+3$
$C$. Maximum stable oxidation state of $Mn$ in oxides	$iii$. $+4$
$D$. Characteristic oxidation state of Lanthanoids	$iv$. $+5$
	$v$. $+7$

The order of melting points of $Cr$,$Mo$,and $W$ is:

The hardness of $Cr$ is due to $......$ and metallic lustre is due to $.......$

$A$ transition metal $M$ among $Sc, Ti, V, Cr, Mn$ and $Fe$ has the highest second ionisation enthalpy. The spin only magnetic moment value of $M^{+}$ ion is $. . . . . . . BM$ (Near integer)
(Given atomic number $Sc: 21, Ti: 22, V: 23, Cr: 24, Mn: 25, Fe: 26$)

What are the $d-$block elements in the modern periodic table known as?