The table shows the percentages of gases x, y and z. X Y Z 0.03% 21% 78% What change would you expect if exhaled air was tested? (i) The percentage of gas x will increase. (ii) The percentage of gas y will remain unchanged. (iii) The percentage of gas z will remain unchanged.

The table shows the percentages of gases x, y and z. X Y Z 0.03% 21% 7

1.	The table shows the percentages of gases x, y and z. X Y Z 0.03% 21% 78% What change would you expect if exhaled air was tested? (i) The percentage of gas x will increase. (ii) The percentage of gas y will remain unchanged. (iii) The percentage of gas z will remain unchanged.
A.	only (i) and (ii)
B.	only (i) and (iii)
C.	only (ii) and (iii)
D.	(i), (ii) and (iii)
Answer» C. only (ii) and (iii)