The ratio of Radius to Area would be equivalent to π. So, option A is the correct answer.
What is a circle?
A circle is a shape consisting of all points in a plane that are given the same distance from a given point called the center.
Consider a circle of radius r so,
The area of the circle = πr^2
The ratio of radius to an area
r: πr^2
1: πr
Thus, the ratio is equivalent to π.
Learn more about circles;
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