Question

Riya has an A positive blood type, she wants to donate her blood. She can donate blood to the person with which of the following type?
A. A negative
B. B positive
C. O negative
D. AB positive
E. AB negative

Answer 1

Hint:- Karl Landsteiner discovered the blood group system i.e. ABO blood group system which consists of four types of blood group: A, B, O, and AB and it is based on the antigens and antibodies on red blood cells and in the plasma.

Complete Answer:-
Rh factor or Rh antigen (Rhesus factor) is another most important blood group system. It is an inherited protein present on the surface of red blood cells. Based on the presence of this Rh factor on the RBC surface individual is classified as Rh-positive or Rh-negative.
A. A negative- On red blood cell surface only A antigen is present. A blood type can receive blood from A and O blood type individuals. But they can donate blood to type A and AB. In this case, due to the absence of the Rh factor on RBC, the blood type is A negative. A negative blood type person can donate blood to other A-, A+, AB+, and AB- recipients.
B. B positive- On red blood cell surface only B antigen is present. B blood type can receive blood from B and O blood type individuals. But they can donate blood to type B and AB. In this case, due to the presence of the Rh factor on RBC, the blood type is B positive. B positive blood type person can donate to both B+ and AB+ recipients.
C. O negative- On red blood cell surface no antigen is present. O blood type can receive blood only from O type individuals. O negative blood type is considered a universal donor. They can donate to all blood types. In this case, due to the absence of the Rh factor, the blood type is O negative.
D. AB positive- On red blood cell surfaces both A and B antigen is present. AB blood type can receive blood from all four blood types. AB (-) blood type is a Universal recipient. They can only donate blood to the AB blood type. In this case, due to the presence of Rh factor on RBC, the blood type is AB positive.
E. AB negative- In this case, due to the absence of Rh factor on RBC, the blood type is Ab negative. They receive blood from all types. AB negative is the rarest blood type.
Image showing Blood group and their characteristics:

So, as we have discussed above the correct option is C (AB positive) as well as she can donate blood to A positive also.

Note:- Karl Landsteiner discovered the blood group system i.e. ABO blood system. One of the most important significance of the blood group system is to ensure safe blood transfusion.