Multiple choice

Pick the true statement regarding the ABO blood system.

  1. It was discovered in the 1950's.

  2. It was discovered by Karl Landsteiner.

  3. Determining ABO blood types is a difficult procedure.

  4. Type AB-negative is the universal donor.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Karl Landsteiner discovered the ABO system in 1900 and 1901, while trying to understand why blood transfusions sometimes saved lives and at other times caused death.

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