Match the element in column A with the valency exhibited by the element given in column B
`{:(,"Column A",,,"Column B"),((A),"Neon",(),(a)," "4),((B),"Oxygen",(),(b)," "3),((C),"Potassium",(),(c)," "2),((D),"Boron",(),(d)," "1),((E),"Silicon",(),(d)," "0):}`
A. `Atob," " Btoc," " Ctod, " " Dtoe, " " Etoa`
B. `Atob," " Btoc," " Ctoa, " " Dtoe, " " Etod`
C. `Atoe," " Btod," " Ctoa, " " Dtob, " " Etoc`
D. `Atoe," " Btoc," " Ctod, " " Dtob, " " Etoa`