Select the correct option:
$(1)$ Nasal cavity acts as an air conditioner.
$(2)$ Cigarette smoke causes emphysema.
$(1)$ Nasal cavity acts as an air conditioner.
$(2)$ Cigarette smoke causes emphysema.
- ABoth $(1)$ and $(2)$ are correct.
- BOnly $(1)$ is correct.
- COnly $(2)$ is correct.
- DBoth $(1)$ and $(2)$ are incorrect.
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