Which statement is true regarding a chemical reaction

Question

Even if the total number of atoms does not change mass be not be come first in the reaction
The total number of atoms does not change so masses converse in the reaction
Even if the total number of atoms, changes mass may not be comforted in the reaction
The total number of atoms changes, the masters converted in the reaction

Answer 1

The total number of atoms changes, the masses convert in the reaction.