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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