Answer:
RP
Step-by-step explanation:
we know that
The line segment connecting two points on a circle's circumference is a <em><u>chord</u></em>. When the chord passes through the center of a circle it is called the diameter.
The <u><em>radius</em></u> of a circle is the distance from the center of the circle to any point on its circumference
so
<u><em>Verify each case</em></u>
RP ----> is a chord (because is a segment connecting two points on a circle's circumference)
OM ---> is a radius (because the point O is the center and the point M is on a circle's circumference)
ON ----> is a radius (because the point O is the center and the point N is on a circle's circumference)
QO ----> is a radius (because the point O is the center and the point Q is on a circle's circumference)