What is the rarest blood type in humans?

Correct answer: D. AB-

  • A. O-
  • B. O+
  • C. AB+
  • D. AB-

Explanation

Among the eight commonly taught ABO and Rh blood groups, AB-negative is the rarest. Rarity can vary by population, and very unusual types such as Rh-null are not included in these options.

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