Question

Why is blood group 'O' is known as universal donor?​

Answer 1

Explanation:

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People with type O- blood are called universal donors because their donated red blood cells have no A, B or Rh antigens and can therefore be safely given to people of any blood group. ... Their plasma does not contain A or B antibodies and can be transfused safely to all blood types.

Answer 2

Answer:

dear here is ur answer

blood group O do not contain any antibodies i.e. antibody A ,B

so it can be donated to a person with any blood group.