A) during pregnancy
B) through transfusion
C) in a test tube
D) Both (a) and (b)
Correct Answer: D
Solution :
Landsteiner and Weiner (1940) discovered Rh antigens in the rhesus monkey. Now, it is found in most human beings. Human with this factor are said to be\[R{{h}^{+}}\]and human without this factor are said to be\[R{{h}^{-}}\]. The problem due to Rh incompatibility arise when the blood of\[R{{h}^{+}}\]person and\[R{{h}^{-}}\] women mixes up during pregnancy or through blood transfusion.
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