A spring with spring constant K and length L was attached to a mass m and rotated about its axis at other end (in horizontal plane) with angular velocity w. Find elongation in spring

Options

A. `(K- m w^2 L)/(m w^2)`
B. `(K+ m w^2 L)/(m w^2)`
C. `(m w^2 L)/(K - m w^2)`
D. `(m w^2 L)/(K + m w^2)`