The frequency of oscillation of the springs shown in the figure will be [AIIMS 2001; Pb. PET 2002]

• A. \[\frac{1}{2\pi }\sqrt{\frac{K}{m}}\]
• B. \[\frac{1}{2\pi }\sqrt{\frac{({{K}_{1}}+{{K}_{2}})m}{{{K}_{1}}{{K}_{2}}}}\]
• C. \[2\pi \sqrt{\frac{K}{m}}\]
• D. \[\frac{1}{2\pi }\sqrt{\frac{{{K}_{1}}{{K}_{2}}}{m({{K}_{1}}+{{K}_{2}})}}\]