Which of the following are the part or example of symbiotic mutualistic association?
$I.$ Yeast
$II.$ Rhizobium
$III.$ Mycorrhiza
$IV.$ Oscillatoria
Leghaemoglobin occurs in
Mycorrhiza represents
Organic farming includes
$I.$ use of biofertilisers and biopesticides
$II.$ crop rotation
$III.$ locally developed pest resistant varieties
Choose the correct option
Biofertilizers