How does the Lewis blood group system influence the secretion of ABH antigens in saliva?

A It enhances the secretion of ABH antigens
B It inhibits the secretion of ABH antigens
C It has no effect on the secretion of ABH antigens
D It determines the presence or absence of ABH antigens in saliva ✓

Explanation

The Lewis blood group system determines whether an individual is a secretor (Se) or non-secretor (se) of ABH antigens in their saliva and other bodily fluids. This affects the expression of ABO blood group antigens.

Source

Textbooks on immunohematology and transfusion medicine
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Hard MEDICAL Confidence: high