Assertion (A): Gaseous exchange in mammals occurs in alveoli, air sacs clustered at the tips of the finest bronchioles.
Reason (R): The type of epithelial layer of serous membranes such as the pleura is the same as that found in alveoli.
In light of the above statements, choose the correct option:
1. (A) and (R) are true, (R) is the correct explanation of (A)
2. (A) and (R) are true, (R) is not the correct explanation of (A)
3. (A) is true, (R) is false
4. (A) is false, (R) is true