One end of a long mettalic wire of length L is tied to the ceiling. The other end is tied to massless spring of spring constant K. A mass M hangs freely from the free end of the spring. The area of cross-section and Young's modulus of the wire are A and Y respectively. If the mass is slightly pulled down and released, it will oscillate with a time period T equal to

Options

A. `2pi(m/K)`
B. `2pi[((YA+KL)m)/(YAK)]^(1/2)`
C. `2pi(mYA)/(KL)`
D. `2pi(mL)/(YA)`

Answer

B