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| Column$-I$ (Group of bacteria) |
Column$-II$ (Their shape) |
| $a.$ Coccus | $(i)$ Rod-shaped |
| $b.$ Bacillus | $(ii)$ Spherical |
| $c.$ Spirillum | $(iii)$ Spiral |
| $d.$ Vibrium | $(iv)$ Comma-shaped |
$(i)$ They are saprophytic protists.
$(ii)$ Under suitable conditions, they form an aggregation (called plasmodium) which may grow and spread over several feet.
$(iii)$ During unfavourable conditions, the plasmodium differentiates and forms fruiting bodies bearing spores at their tips.
Which of the following class of protists is being described by the above statements