Asthma is caused by:

A ) Perfumes ✅

B ) Vitamin B-12 deficiency

C ) Vitamin C deficiency

D ) Vitamin K deficiency

Related Questions
  1. Total chemicals in tobacco smoke are:
  2. Many other chemicals in smoke in-crease concentration of ____ blood cells.
  3. The main cause of lung cancer is:
  4. Which disease is not related to lungs?
  5. Lungs are organs which are;
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