The oxidation state of nitrogen is correctly given for

Options

A. `{:(,,"Compound","Oxidation state"),(,1,[CO(NH_(3))_(5)Cl]Cl_(2),0):}`
B. `{:(,,"Compound","Oxidation state"),(,2,NH_(2)OH,-2):}`
C. `{:(,,"Compound","Oxidation state"),(,3,(N_(2)H_(5))_(2)SO_(4),+2):}`
D. `{:(,,"Compound","Oxidation state"),(,4,Mg_(3)N_(2),-3):}`

Explanation

`[Co^(+3) (NH_(3)^(-))_(5) Cl^(-)]^(+2) Cl_(2)^(-1 xx 2)`
oxidation state of N=3