ln the figure shown a block of mass m is attached at ends of two springs. The other ends of the spring are fixed. The mass m is released in the vertical plane when the springs are relaxed. The velocity of the block is maximum when

• A

  ${\mathrm{k}}_1$ is compressed and ${\mathrm{k}}_2$ is elongated

• B

  ${\mathrm{k}}_1$ is elongated and ${\mathrm{k}}_2$ is compressed

• C

  ${\mathrm{k}}_1$ and ${\mathrm{k}}_2$ both are compressed

• D

  ${\mathrm{k}}_1$ and ${\mathrm{k}}_2$ both are elongated.