Categorize the following nitrogen-fixing microorganisms into symbiotic and free-living types:
$I-$ Rhizobium
$II-$ Azotobacter
$III-$ Beijerinckia
$IV-$ Rhodospirillum
$V-$ Frankia
$VI-$ Bacillus
$VII-$ Anabaena (free-living)
$VIII-$ Nostoc (symbiotic)
Select the correct grouping for (Symbiotic) and (Free-living) respectively.

• A
  $I, V, VIII \quad II, III, IV, VI, VII$
• B
  $II, III, IV, VI, VII \quad I, V, VIII$
• C
  $I, V, VII, VIII \quad II, III, IV, VI$
• D
  $I, III, IV, VI \quad I, V, VII, VIII$