What part of the tooth is being pointed by the letter B?

The correct answer to this question isneck. The neck of the tooth is also known as the dental cervix. It can be found between the crown and root. The neck also forms the line where the cementum meets the enamel. There are three parts of the neck.

The first are the gums, which are the pink connective tissue, which is attatched to both the neck and the cementum. The second part is the pulp, which is made of nerve tissues and tiny blood vessels. The last part is the pulp cavity, which is the space inside the crown that houses the pulp.