A person with blood group AB is considered as universal recipient because he has:

The correct option is A

Both A and B antigens on RBC but no antibodies in the plasma

The correct option is A:

Explanation of the correct answer:

1. Persons with AB blood group have both A and B antigens on the RBCs, but no antibodies in the plasma.
2. This allows them to receive blood from any of the other blood types.
3. This is why they are called universal recipients.

Explanation of the incorrect options:

Option B:

1. In O blood type, no antigens are present on the RBCs, but anti-A and anti-B antibodies are present in the plasma.
2. The condition of absence of both antigens and antibodies is not possible in ABO blood typing.

Option C:

1. People with the AB blood group have both A and B antigens on RBC but no antibodies in the plasma. Therefore, this option is incorrect.

Final answer: A person with blood group AB is considered a universal recipient because he has both A and B antigens on RBC but no antibodies in the plasma.