Which of the following statements is incorrect?
1
A person of ‘O’ blood group has anti ‘A’ and anti ‘B’ antibodies in his blood plasma.
2
A person of ‘B’ blood group can’t donate blood to a person of ‘A’ blood group.
3
Blood group is designated on the basis of the presence of antibodies in the blood plasma.
4
A person of AB blood group is universal recipient.