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| Column-$I$ | Column-$II$ |
|---|---|
| $(a)$ Parasitism | $(i)$ $++$ |
| $(b)$ Commensalism | $(ii)$ $+-$ |
| $(c)$ Amensalism | $(iii)$ $0+$ |
| $(d)$ Mutualism | $(iv)$ $0-$ |
| $A. +/+$ | $I. \text{Predation}$ |
| $B. -/-$ | $II. \text{Ammensalism}$ |
| $C. +/-$ | $III. \text{Competition}$ |
| $D. -/0$ | $IV. \text{Mutualism}$ |
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