An important difference between ABO blood grouping and Rh blood grouping is - Sri Chaitanya Infinity Learn Best Online Courses for NCERT Solutions, CBSE, ICSE, JEE, NEET, Olympiad and Class 6 to 12

A
ABO grouping is based on the presence or absence of antigens while Rh grouping is based on the presence or absence of antibodies
B
A and B antigens are present on the surface of RBC while Rh antigens are present on the surface of WBC
C
Rh^-ve individuals do not have anti-Rh antibodies in their blood plasma unless they have been sensitised
D
erythroblastosis foetalis occur due to ABO incompatibility but not due to Rh incompatibility

Solution:

Rh^-ve individuals do not have anti-Rh antibodies in their blood plasma unless they have been sensitised. An Rh^-ve person, if exposed to Rh^+ve blood, will form specific antibodies against the Rh antigens.