As you know, blood of human beings differ in certain aspects though it appears to be similar. Various types of grouping of blood has been done. Two such groupings – the ABO and Rh – are widely used all over the world.
Assertion (A): The Rh blood group system is named after Rhesus monkeys. Reason (R): The Rh antigen was first discovered in human blood and later found to be absent in Rhesus monkeys.
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