Ecological age groups of a population are:
$I.$ Pre-reproductive
$II.$ Reproductive
$III.$ Post-reproductive
$IV.$ Old-age group
$V.$ Adolescent age group
$VI.$ Infertile age group
Choose the correct option for the given statements.

  • A
    $I, II$ and $III$
  • B
    $III, IV$ and $V$
  • C
    $IV, V$ and $VI$
  • D
    $I, V$ and $VI$

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