The main cause of lung cancer is:

A ) Smoking ✅

B ) Viral infection

C ) Bacterial infraction

D ) Both viral and bacterial infraction

Related Questions
  1. Identify the correctly matched pair:
  2. Function of pleural membrane is to:
  3. Air passageway starts from:
  4. Which disease is not related to lungs?
  5. Percentage of carbon dioxide in expired air during breathing is:
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