What is the universal plasma type mentioned in the material?

• A. Type A
• B. Type B
• C. Type AB
• D. Type O

Answer: (A)

Universal plasma is AB. In plasma transfusion, the key factor is antibodies present in the donor plasma. AB plasma contains no anti-A or anti-B antibodies, so it can be given to patients of any ABO type without risk of antibody-mediated reactions. In contrast, plasma from type A donors has anti-B antibodies, type B plasma has anti-A antibodies, and type O plasma has both anti-A and anti-B antibodies, making them incompatible with most non-O recipients for plasma transfusion. So AB plasma is the only type considered universal for plasma transfusion.