1. There is a single epitope on the extracellular domain of the transmembrane protein that is expressed as the antigen. A radiolabelled F fragment (specific activity: 100 cpm/picomole) against this epitope was incubated with the cells that survived (assuming 100% transfection and expression of protein). Cell pellets with 1000 cells per millilitre are obtained after washing. The average number of epitopes present on a single recombinant alga are; A. 1 * 106 B. 1* 10 C. 6 * 10 D. 6 * 10