Question

3) What is the percentage of CO2 in exhaled air?
(a) 23%
(b) 4.4%
(c) 6%
(d) 0.04%​

Answer 1

Explanation:

(b) 4.4%..............

Answer 2

Answer:

b) 4.4%

Explanation:

0.04% is in inhaled air

Exhaled air contains almost 4% carbon dioxide, due to respiration

so answer should be b)