A particle executies linear simple harmonic motion with an amplitude `3cm` .When the particle is at `2cm` from the mean position , the magnitude of its velocity is equal to that of acceleration .The its time period in seconds is
A. `sqrt(5)/(2 pi)`
B. `(4pi)/(sqrt(5))`
C. `(2pi)/(sqrt(3))`
D. `sqrt(5)/(pi)`