The correct answer is: A. Lead-acid
A lead-acid battery is a type of rechargeable battery that uses a lead-acid electrochemical cell. It is the most common type of battery used in automobiles, and it is also used in other applications such as backup power supplies and uninterruptible power supplies (UPS).
The lead-acid battery has a reversible chemical reaction, which means that it can be recharged by passing an electric current through it in the opposite direction of the discharge current. This makes it a very versatile battery, and it is one of the most economical types of battery available.
The other options are incorrect because they do not have a reversible chemical reaction.
- Mercury oxide batteries are primary batteries, which means that they cannot be recharged.
- Carbon-zinc batteries are also primary batteries.
- Silver-oxide batteries are secondary batteries, which means that they can be recharged, but they do not have a reversible chemical reaction.
I hope this helps!