Chemical Reactions Do Not Change the Identity of the Participating $\rarr$

Chemical reactions do not change the identity of the participating atoms;all atoms present at the beginning of the reaction must be present at the end.Balance the chemical reaction by indicating the number of molecules necessary for each reactant and product: ________ Cl₂ +________ NaBr $\rarr$ _______ Br₂ + ________ NaCl.

A) 1;1;1;1
B) 1;2;1;1
C) 1;2;1;2
D) 2;2;1;2