Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen ?

Which ordering of compound is according to the decreasing order of th e oxidation state of nitrogen?

Which ordering of compounds is according to decreasing order of the oxidation state of nitrogen?

Which order of the compounds is according to the decreasing order of oxidation state of nitrogen

Which of the following sequence of compounds is according to the decreasing order of the oxidation state of nitrogen ?