Question

Apart from the ABO blood groups, humans can also be Rhesus positive or
Rhesus negative.
People with the Rhesus antigen are Rhesus positive. When a Rhesus negative
person is given Rhesus positive blood in a transfusion there is no problem.
However, a second transfusion of Rhesus positive blood to this Rhesus
negative person will result in a reaction between the two types of blood.

Which statements explain this?

1. A Rhesus negative person naturally has anti-Rhesus antibodies.
2. Exposure to Rhesus antigen causes anti-Rhesus antibody production.
3. B-cells make anti-Rhesus antibodies.
4. Anti-Rhesus antibody production begins after the second exposure.

A. 2,3
B. 1,2,3,4
C. 1,2
D. 3,4
E. Only 3
explain.

Answer 1

Answer:

B 1, 2, 3 and 4 is the appropriate option