The four main groups are... Group O+ (the commonest), group A+, group B+ and group AB+
Type O is the most common, with about half of the population having O type blood.
They are two of the commonest blood groups.
commonest medium of communication
Blood group A can donate and receive blood from blood group A. Blood group B can donate and receive blood from blood group B. Blood group AB can donate only to blood group AB and receive from any other blood group (they are universal recipent) Blood group O can donate to any other blood group ( they are universal donor) and can receive from only blood group O.
Underground aquifers are the commonest source for well water.Underground aquifers are the commonest source.
dorminant
which blood group can be donate to all other groups? "O" positive blood group. it's called universal donor.
If you are in the AB blood group, you can only donate blood to others in the AB group. You can receive blood from any group.
A or AB
A or O
o-