A person with unknown blood group under A B O system, has suffered...

A person with unknown blood group under

A B O

system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?

Options

AType $A B$
BType $\mathrm{O}$
CType $\mathrm{A}$
DType B

Correct answer

B. Type $\mathrm{O}$

Step-by-step solution

Blood type '

\mathrm{O}

' has no any antigen but both types of antibodies '

a

' and '

\mathrm{b}

'. The person with blood type '

O

' is universal donor.

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