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Can someone help me with this pls

Which of the following results in agglutination?
(1) similar blood types being mixed
(2) the separation of blood cells from plasma
(3) antigens reacting to other antigens
(4) antibodies reacting to foreign antigens (5) the donation of blood to a blood bank​


Sagot :

Answer:

your answer is antibodies reacting to foreign antigens.

Answer: antibodies reacting to other antigens