Which blood group is referred to as the 'Universal Donor'?

Correct option is B

The correct answer is (B) O

The blood group referred to as the 'Universal Donor' is O-negative .

Explanation:

• Blood transfusions depend on compatibility between the donor's and recipient's blood types.
• O-negative blood lacks A, B, and Rh antigens on the surface of its red blood cells. This means:
• It does not trigger an immune response in recipients with any blood type.
• It can safely be given to individuals of any ABO and Rh blood group.

Because of this universal compatibility, O-negative blood is especially crucial in emergencies and for newborns.

Information Booster:

1. Blood Group A:

• Antigens on RBCs: A
• Antibodies in Plasma: Anti-B
• Can Donate To: A, AB
• Can Receive From: A, O

2. Blood Group B:

• Antigens on RBCs: B
• Antibodies in Plasma: Anti-A
• Can Donate To: B, AB
• Can Receive From: B, O

3. Blood Group AB:

• Antigens on RBCs: A and B
• Antibodies in Plasma: None
• Can Donate To: AB only
• Can Receive From: All groups (A, B, AB, O) – Universal Recipient

4. Blood Group O:

• Antigens on RBCs: None
• Antibodies in Plasma: Anti-A and Anti-B
• Can Donate To: All groups (A, B, AB, O) – Universal Donor
• Can Receive From: O only