![In the ABO system, blood group ‘O’ is characterized by the](https://www.gkseries.com/blog/wp-content/uploads/2022/01/In-the-ABO-system-blood-group-‘O-is-characterized-by-the.png)
Q. In the ABO system, blood group ‘O’ is characterized by the:
A. presence of antigen O
B. presence of both antigen A and antigen B
C. absence of both antigen A and antigen B
D. presence of antigen A and absence of antigen B
Answer: absence of both antigen A and antigen B