Which of the following are the part or example of symbiotic mutualistic association?
$I.$ Yeast
$II.$ Rhizobium
$III.$ Mycorrhiza
$IV.$ Oscillatoria

  • A
    $I$ and $II$
  • B
    $I$ and $III$
  • C
    $II$ and $III$
  • D
    $III$ and $IV$

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