The part B is a great circle.
What is a great circle?
A great circle is the largest possible circle that can be drawn around a sphere.
According to the given problem,
The part B of the circle is a great circle because If we cut a sphere at one of its great circles, you'd cut it exactly in half. A great circle has the same circumference, and the same center point as its sphere.
Hence, we can conclude, the part B of the circle is called a Great Circle.
Learn more about Great Circle here: https://brainly.com/question/23918434
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