Question

A man having an 'A' blood group met a serious road accident and the doctors advised for blood transfusion. The relatives were asked to donate blood, whose blood groups were found to be as follows:

i) Wife - 'O'

ii) Brother - 'AB'

iii) Son - 'A'

iv) Daughter - 'O'

Who among the above relations could donate blood to the injured man?

1. i and ii
2. ii and iii
3. ii, iii and iv
4. i, iii and iv

Answer 1

Correct Answer - Option 4 : i, iii and iv

The correct answer is Wife - 'O', Son - 'A' AND  and Daughter - 'O'.

• A person of blood group A can receive blood either from group A or O as there are no antibodies for A and O in blood group A.

• Blood transfusion:
  • It is the process of transferring blood products from one to another blood circulatory system.

• ABO blood group system:
  • The basis of ABO grouping is two antigens:
    • Antigen A and
    • Antigen B
  • The ABO grouping system is classified into four types.
  • It is based on the presence or absence of antigens in the red blood cells and plasma antibodies.
    • Group A
      • It contains antigen A and antibody B.
    • Group B
      • It contains antigen B and antibody A.
    • Group AB
      • It contains both A and B antigens and no antibodies (neither A nor B).
    • Group O
      • It contains neither A nor B antigens and both antibodies A and B.
• It is important for the blood cells to match while transfusing.
• Donor-recipient adaptability is needed.
• For example, a person of blood group A can receive blood either from group A or O as there are no antibodies for A and O in blood group A. Hence statements 1,3 and 4 are correct.

• Karl Landsteiner, an Austrian scientist discovered the ABO blood group system.