P | - | Animals breathing through lungs only. |
Q | - | Animals breathing by skin only. |
R | - | Animals breathing by gills. |
X | - | Animals breath by skin and gills both. |
Y | - | Animals breath by skin and lungs. |
Z | - | Animals breath by lungs and gills. |
A) Y
B) X
C) Z
D) P
Correct Answer: A
Solution :
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