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. `2pisqrt((M//K))`
B. `2pisqrt(M(YA+KL)//YAK)`
C. `2pisqrt((MYA//KL))`
D. `sqrt((ML//YA))`

Answer

B