MCQ IN MEDICINE

Detailed explanation-1: -The Anti-A, Anti-B, and Anti-A, B reagents are used in the red blood cell determination of the ABO blood group. They are used to determine the absence or presence of erythrocytic antigens A and/or B on the surface of human red blood cells.

Detailed explanation-2: -Neither the A nor B antigen. You have type O blood. Your plasma has antibodies that attack both type A and type B blood. About 48% of people (48 in 100) in the U.S. have type O blood, with 9% having O-negative (O-) blood and 39% having O-positive (O+) blood.

Detailed explanation-3: -A+ blood has anti-B antibodies, so that patient can’t receive any blood who has B antigen. AB+ blood has A antigen and B antigen. Thus the recipient’s anti-B antibodies can bind to the B antigen from the donor and may cause massive immune response leading to kidney failure, clot formation and death.

Detailed explanation-4: -Anti-A and anti-B are found in the sera of individuals who lack the corresponding antigens. They are produced in response to environmental stimulants, such as bacteria. These antibodies are produced after birth, reaching a peak at 5–10 years of age, and declining with increasing age.