Which two of the following five physical parameters have the same dimensions?
$(a)$ Energy density
$(b)$ Refractive index
$(c)$ Dielectric constant
$(d)$ Young's modulus
$(e)$ Magnetic field

  • A
    $(a), (d)$
  • B
    $(a), (e)$
  • C
    $(b), (d)$
  • D
    $(c), (e)$

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