Which Seatpost clamp do I need?

A - Following V1, Insurgent V1, Calling, Following MB (V2), Insurgent LB (V2), Offering (V1), Following (V3), Wreckoning (V3), Offering (V2), Insurgent(V3), Epocalypse, Following LS, Wreckoning LS, Offering LS, Insurgent LS