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