DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 Fig. Model to show mechanism of breathing. The figure shows a plastic bottle whose bottom has been removed. A tube has been passed by making a hole in its lid. To the forked ends of this tube are attached two deflated balloons. The bottle is sealed in such a way that it becomes air-tight. What do we inhale?

DIRECTIONS: Read the passage (s) given below and answer the questions

1.	DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 Fig. Model to show mechanism of breathing. The figure shows a plastic bottle whose bottom has been removed. A tube has been passed by making a hole in its lid. To the forked ends of this tube are attached two deflated balloons. The bottle is sealed in such a way that it becomes air-tight. What do we inhale?
A.	Oxygen
B.	Carbon dioxide
C.	A mixture of gases
D.	None of these
Answer» D. None of these