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The various groups and subgroups.
| Group-I | Group-II | Group-III | Group-IV |
|---|---|---|---|
| Sub-Group I A | Sub-Group II A | Sub-Group IIIA | Sub-Group IVA |
| Sub-Group I B | Sub-Group II B | Sub-Group III B | Sub-Group IV B |
| Sub-Group I C | Sub-Group II C | Sub-Group III C | Sub-Group IV C |
| Sub-Group I D | Sub-Group II D | Sub-Group III D | Sub-Group IV D |
