gas A B C name of the gas nitrogen oxygen carbon dioxide water vapour Table 1.1 percentage in inspired air 78 21 0.04 variable percentage in expired air 78 16 4 saturated (i) Complete Table 1.1 by writing the names of gases B, C and D. [3] (ii) For gas B and gas C, explain the differences in the percentages shown in Table 1.1 between inspired and expired air.​