The following organometallic compounds are stable and has a second row transition metal at its centre. Find out the metal and its oxidation state

A

B

C

D

$\backslash$table$[[$yitun$,$zroontin,nibbein,molybinat,Dethetum,nerrain,Thain,patsinin,s$,$adium$],[39,40,41,42,43,44,45,46,47,48],[,91224,200,654,,10107,10991,1064,10181,11241]]$