Label the
- intercept and center of the circle.
Standard form of a circle is
, where
is center and
is radius.
From the figure center of the circle
.
The distance between center and
-intercept is radius.
The distance between
and
is radius of the circle.
Calculate the distance between two points by using formula:
.
Substitute the values of 
and
in distance formula.



.
Radius
.
Substitute the center and radius in standard form of the circle
.


Option (c) is correct.
\Option (c) is correct.