1.

Even though a donor X and a recipient Y belongs to the same blood group, tranfusion of blood leads to aggulutination. This is because

A. X is\[R{{h}^{+}}\]and Y is \[R{{h}^{-}}\]
B. Haemoglobin of X and Y is different
C. X is \[R{{h}^{-}}\] and Y is \[R{{h}^{-}}\]
D. Both are \[R{{h}^{+}}\]
Answer» B. Haemoglobin of X and Y is different


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