The p-Block Elements — Chemistry STD 12 Science — Question

$(I)$ the nature of the ligand

$(II)$ the charge on the metal ion

$(III)$ whether the metal is in the first, second or third row of the transition  elements

$2NO + 2H_2 \longrightarrow N_2 + 2H_2O$

has following mechanism

Step $-I$ : $2NO \longrightarrow N_2O_2$

Step $-II$ : $N_2O_2 + H_2 \longrightarrow N_2O + H_2O$

Step $-III$ : $N_2O + H_2 \longrightarrow N_2 + H_2O$

Which of the following substance is a reaction intermediate