| Column $I$ $\&$ $II$ | Column $III$ |
|---|---|
| $a. (+, -)$ | $P. \text{Amensalism}$ |
| $b. (-, -)$ | $Q. \text{Commensalism}$ |
| $c. (-, 0)$ | $R. \text{Predation}$ |
| $d. (+, 0)$ | $S. \text{Competition}$ |
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| Column-$I$ | Column-$II$ |
| $(a)$ Yucca moth | $(i) \,(+, 0)$ |
| $(b)$ Orchid | $(ii) \,(+, -)$ |
| $(c)$ Hermit crab | $(iii) \,(+, +)$ |
| $(d)$ Plasmodium | $(iv) \,(+, -)$ |
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