Correct option is (D) 7 cm
Chord that passes through the centre of the circle is diameter of that circle.
\(\therefore\) Diameter = 14 cm
\(\Rightarrow\) 2r = 14 cm
\(\Rightarrow\) r = \(\frac{14}2\) = 7 cm
\(\therefore\) Radius of the circle is 7 cm.
