Answer the following very briefly:
Why is it necessary to know the blood groups of the donor as well as the recipient?

The blood groups of both the donor and the recipient should be known before transfusing.

Give reasons for the following:

The blood group of the recipient and donor are matched before blood transfusion.

Answer very briefly, the following:​

Why is it necessary to know the blood group of the donor as well as the recipient?

why is it necessary to know the blood groups of the donor as well as the recipient?