WBCS.LIVE practice question

Which human blood group is universally known as the "Universal Donor" in medical emergencies?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. O Negative
  2. O Positive
  3. A Negative
  4. AB Positive

Correct answer and explanation

Correct answer: AB Positive

Explanation: āœ… Correct Answer: D) O Negative šŸ“š Explanation: In emergency blood transfusions where the patient's exact blood type is completely unknown, O Negative (O-) blood is incredibly vital. It is called the "Universal Donor" because its red blood cells lack A, B, and Rh antigens. Therefore, it will not trigger a dangerous immune rejection response in patients of any other blood type.