Question

Toothpastes which contain _____ and _____ are beneficial.

chlorine
sodium chloride
baking soda
nitride
fluoride
carbide

Answer 1

Baking soda and Fluoride

Step-by-step explanation:

Answer 2

Answer - Baking Soda & Fluoride

Reasoning -
Since Fluoride takes out and cleans out tooth decay which is helpful since we don't want that.
Baking Soda helps activite the tiny particles in the teeth to get the chemical reaction going.