Two masses $M_{A}$ and $M_{B}$ are hung from two strings of length $l_{A}$ and $l_{B}$ respectively. They are executing $SHM$ with frequency relation $f_{A}=2 f_{B}$,then the relation is:

  • A
    $l_{A}=4 l_{B},$ does not depend on mass
  • B
    $l_{A}=\frac{l_{B}}{4},$ does not depend on mass
  • C
    $l_A=2 l_B$ and $M_A=2M_B$
  • D
    $l_{A}=\frac{l_{B}}{2}$ and $M_{A}=\frac{M_{B}}{2}$

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