Answer:
The correct option is a.
Step-by-step explanation:
The given statement is all circles are similar to each other.
A circle is the set of points in a plane that are equidistant from a given point which is known as circle.
Two figures are similar if their corresponding sides are proportional.
Circles are completely dependent on its radius. The radius of any two circles are proportional for any point on the circles.
The statement "All circles are similar to each other" is true.
Therefore the correct option is a.
