A.3,2,0,+1/2 B.2,1,0,-1/2 C.1,1,0,+1/2 D.5,3,0,+1/2
A.3,1,2,+1/2 B.3,2,1,-1/2 C.2,1,1,-1/2 D.2,1,0,-1/2
A.CHCl3 B.NH3 C.CH4 D.BCl3