What is the function of blood component that expresses CD55, a marker involved in the regulation of complement system?

A Regulation of blood pressure
B Protection of cells from complement-mediated lysis ✓
C Transport of oxygen
D Clotting of blood

Explanation

CD55, also known as decay-accelerating factor, is a protein that inhibits the complement system by preventing the formation of convertases, thereby protecting cells from complement-mediated lysis.

Source

Immunology and Hematology textbooks
Hematology Hematology: Blood Components Hematology: Blood Components Medium MEDICAL Confidence: high