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A person of which blood group can be a universal donor?
1. O
2. A
3. B
4. AB

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Correct Answer - Option 1 : O

The correct answer is O.

  • A person of blood group O can be a universal donor.
  • A blood type (also known as a blood group) is a groupage of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs).
  • These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system.
  • Some of these antigens are also operating on the surface of other types of cells of various tissues.

  • Many of these red blood cell surface antigens can stem from one allele (or an alternative version of a gene) and collectively form a blood group system.
  • Blood types are inherited and portray the contributions from both parents.
  • As of 2019, a total of 41 human blood group systems are recognized by the International Society of Blood Transfusion (ISBT).
  • The two most vital blood group systems are ABO and Rh;
    • They determine someone's blood type (A, B, AB, and O, with +, − or null denoting RhD status) for suitability in blood transfusion.

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