Question

What is true of blood group B
A. The person can form antibody B
B. The person cannot form antibody B
C. The person cannot be given blood of '0' group
D. The person can receive the blood from the AB group.

Answer 1

Hint: Blood groups are determined by the antigen present on the membrane of RBC. When different blood groups are administered to patients, coagulation of blood occurs leading to the rejection of that blood by the body.

Complete answer: Blood grouping is a type of codominance in which two blood groups are equally dominant over one another. In humans, blood group AB is seen because of the presence of codominance. The antigen present on the membrane if RBC determines the blood group. The presence of A antigen shows the presence of blood group A and in such organisms antibody A is not produced likewise if, on the membrane, the antigen is B then antibody B will not be present. In the case of blood group O, no antigen either A or B is present.

Additional information: A complete blood type describes a full set of 30 substances on the surface of red blood cells and an individual's blood type is one of many important combinations of blood-group antigens.
Across the 36 blood group systems, 308 distinct blood-group antigens have been investigated. Almost always, an individual has the same blood group for life, but rarely an individual's blood type changes via addition/ suppression of an antigen in infection, malignancy, or autoimmune disease.

Hence, the correct option is, (B) Person cannot form antibody B.

Note: The antigen which is present on the membrane of the RBC determines the type of blood group and the antibody is also determined by the same only.