Arrange the following in order of increasing mass (atomic mass, O = 16, Cu = 63, N =14)
I. One atom of oxygen
II. One atom of nitrogen
III. `1 xx 10^(-10) mol` of oxygen atom
(IV) `1 xx 10^(-10) mol` of copper
(1) `II lt I lt III lt IV`
(2) `I lt II lt III lt IV`
(3) `III lt II lt IV lt I`
(4) `IV lt II lt III lt I`
(5) `II lt IV lt I lt III`

Answer

A