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A pair of compound that can be use to generate a gas which has physiological...

A pair of compound that can be use to generate a gas which has physiological effect on human beings is
A)sodium trioxonitrate(v) and calcium chloride
B)sodium dioxonitrate(iii) and ammonium chloride
C)sodium trioxonitrate(v) and ammonium chloride
D)sodium dioxonitrate(iii) and potassium chloride

Please kindly prove your answer because this questions is very confusing to me.?

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