Statement (A) :The elements like H, Li try to get two electrons in their outermost shell

Statement (B):The elements like Na, Cl try to get eight electrons in their outermost shell.

Statement (C):According to Lewis theory the number of dots around the symbol represents the number of valence electrons

Hydrogen atom gains one electrons and Li atom lose one electron to get He electronic configuration to attains stable

Na atom lose one electron to get Ne configuration + (Na ) and Cl atom gains one electron to get Organ configuration (Cl ) - both are having 8 electron in their outermost shell. Valence electrons are represented by Lewis dots.