Blood type is determined by

Question

Quizplus · Accepted Answer

Blood type is determined by the antigens present on the surface of red blood cells, which can be A, B, AB, or none (O). The presence or absence of these antigens determines a person's blood type.

Answer A is incorrect because antigens are not present in plasma but on red blood cells.
Answer C is incorrect because antibodies are also not present in plasma, but on red blood cells.
Answer D is incorrect because antibodies do exist in blood plasma but they are not responsible for determining blood type.

Blood Type Is Determined by