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Most automobile batteries are made of water and which acid?

A Sulfuric acid
Explaination
Batteries are generally made of lead plates immersed in sulfuric acid and water. As the battery loses/uses up power, the sulfuric acid is reduced to water. Charging your car's batteries means that you're restoring the composition back to its original sulfuric acid and water electrolyte.
B Boric Acid
C Acetic acid
D Hydrochloric acid