What is the name of part B in the sphere below?

A sphere. The great circle is labeled B.
radius
diameter
center
great circle

The name of part B in the sphere is the great circle.

Which statement about a sphere is true?

The length of the diameter of a sphere is two times the length of the radius of the sphere.
The great circle of a sphere is a three-dimensional circle.
The great circle of a sphere is not the same shape as the base of a cone.
The center of a sphere is created from a plane that passes through the sphere.

The statement that is true about a sphere is: The length of the diameter of a sphere is two times the length of the radius of the sphere.

The name of part B in the sphere is the great circle.