why o positive cannod donate to negative groups
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because no antigen is present on rbc of o group and both antibody a and b are present
akshar25092002:
why o negative can donate to all blood groups and o positive cannot give blood to all groups
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O+ cannot donate blood to -ve blood groups because of presence of Rh factor.
Blood groups in which Rh factor is present are termed as +ve and in which it is absent are termed as -ve.
So, -ve blood can make antibodies against the Rh factor which is present in +ve blood group.
Blood groups in which Rh factor is present are termed as +ve and in which it is absent are termed as -ve.
So, -ve blood can make antibodies against the Rh factor which is present in +ve blood group.
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