B is the answer to this question. This is also known as Harper’s Ferry Pistol. This is known to be one of the pistols that became available in the year 1805. Probably because it was made centuries ago, its design is a bit different from the modern pistols that we can see right now. Its overall appearance just adds to its appeal.
There are still some pistols like this that exist right now. They cannot be fired though and they can only be kept as a part of your collection. According to reports, the number of this type of pistol available right now is about 200 to 300.