The relationship between Young's modulus $Y,$ Bulk modulus $K$ and modulus of rigidity $\eta $ is
  • A$Y = \frac{{9\eta K}}{{\eta + 3K}}$
  • B$\eta = \frac{{9YK}}{{Y + 3K}}$
  • C$Y = \frac{{9\eta K}}{{3 + K}}$
  • D$Y = \frac{{3\eta K}}{{9\eta + K}}$
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