Given That There Are 200 V Regions, 5 D Regions

Multiple Choice

Given that there are 200 V regions, 5 D regions, and 20 J regions for the heavy chain; 200 V regions for the kappa light chain and 5 J regions; and 4 subclasses of IgG, how many different specificities can be formed with the kappa light chain and the heavy chain given?

A) 2 X 10⁷
B) 2 X10 ⁶
C) 8 X 10⁷
D) 8 X 10⁸