The Rhesus factor of blood was first identified in a category of
-
monkeys
- human females
- human males
- chimpanzees
The correct answer is: A
Explanation
The Rh, or rhesus, factor was discovered in 1940 by K. Landsteiner and A. S. Wiener when they observed that an injection of blood from a rhesus monkey into rabbits caused an antigenic reaction in the serum component of rabbit blood
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