[单选题]
The elements in the periodic tabl.k(glm ,wiz7,u0db v de which lack one ej/p ztk7 e8wnnjem+slze5),/c a4w 6dlectron from a filled shell are referred to a/5npz4dwc7jn / )tjsleze6w+ka8, e ms
A. noble gases.
B. halogens.
C. alkali metals.
D. transition elements.