Select the option that can be used as a one-word substitute for the given group of words.
Having a common centre, as circles or spheres

Correct option is B

The correct one-word for the given group of words is (b) Concentric.
Concentric: Circles or shapes that share the same center point. (सहकेन्द्रिक – जिनका केन्द्र एक ही हो)
Example: The ripples formed in water after a stone is thrown create concentric circles.
Meanings of the given other options:
· (a) Cylindrical: Having the shape of a cylinder (बेलनाकार)
· (c) Elliptical: Shaped like an oval or ellipse (दीर्घवृत्ताकार)
· (d) Centrifugal: Moving or directed away from the center (केंद्रविमुख)