Which flow diagram correctly shows the impact of tar entering the lungs?
- Acarcinogens come into contact with DNA $\rightarrow$ mutation occurs $\rightarrow$ uncontrolled cell division $\rightarrow$ mass of cells produced
- Bgoblet cells secrete more mucus $\rightarrow$ mucus accumulates causing infection $\rightarrow$ phagocytes attracted by inflammation $\rightarrow$ causes irritation and coughing
- Cgoblet cells secrete more mucus $\rightarrow$ mutation occurs $\rightarrow$ phagocytes attracted by inflammation $\rightarrow$ mass of cells produced
- Dphagocytes attracted by inflammation $\rightarrow$ mutation occurs $\rightarrow$ uncontrolled cell division $\rightarrow$ elastase destroys the alveolar walls