Which of the following is used as biofertiliser?

$I.$ Cyanobacteria

$II.$ Yeast

$III.$ Symbiotic bacteria

$IV.$ Free living bacteria

Choose the correct option

  • A

    $I, II$ and $III$

  • B

    $I, III$ and $IV$

  • C

    $II, III$ and $IV$

  • D

    $I, II$ and $IV$

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