Consider the following statements about ecological pyramids

$I.$ Charles Elton developed the concept of ecological pyramid

$II.$ After the name these pyramids are also called as Eltonian pyramids

$III.$ It is a graphical representation or pyramid shaped diagram which depicts the number of organisms, biomass and energy at each trophic level

Which of the statements given above are correct?

  • A

    $I\;and\; II$

  • B

    $I\; and\; III$

  • C

    $II\; and \;III$

  • D

    $I, II\; and \;III$

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