Answer:
B
Step-by-step explanation:
Equation B is balanced. It has four atoms of H and four of O on each side of the reaction.
A is wrong. It has two atoms of Cl on the left and only one on the right.
C is wrong. It has two atoms of O on the left and four on the right.
D is wrong. It has two atoms of Cl on the left and only one on the right.
