An immunoglobulin (Ig) molecule, of whatever class, with regions ...

[futuristic]

An immunoglobulin (Ig) molecule, of whatever class, with regions symbolized as C or V, H or L, has a light chain made up of
A) one C region and one V region.
B) three C regions and one V region.
C) one H region and one L region.
D) three H regions and one L region.
E) two C regions and two V regions.

[aero]

I remember it was A