B cell functions is tested by all of the following except?
measurement of CH 50 is the best screening test for defiency of classical and terminal pathways.hemolytic activity of compliment system is measured as the hemolysis of sheep erythrocytes sensitised by specific antibodies.the degree of hemolysis is measured by CH 50 REF:HARRISONS PRINCIPLE&;S OF INTERNAL MEDICINE 18TH EDITION
C H 50 count
Amount of Ig G
PPD testing
Cytokine
Immune system