A block of mass $m$ is suspended separately by two different springs have time period $t_1$ and $t_2$ . If same mass is connected to parallel combination of both springs, then its time period will be
  • A$\frac{{{t_1}{t_2}}}{{{t_1} + {t_2}}}$
  • B$\frac{{{t_1}{t_2}}}{{\sqrt {{t_1}^2 + {t_2}^2} }}$
  • C$\sqrt {\frac{{{t_1}{t_2}}}{{{t_1} + {t_2}}}} $
  • D$t_1 + t_2$
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