The problem due to \[R{{h}^{-}}\]factor arises when the blood two (\[R – McqOptions

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1.	The problem due to \[R{{h}^{-}}\]factor arises when the blood two (\[R{{h}^{+}}\]and \[R{{h}^{-}}\]) mix up [CBSE PMT 1999]
A.	In a test tube
B.	Through transfusion
C.	During pregnancy
D.	(a) and (c) both
Answer» E.

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