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| कॉलम-$I$ | कॉलम-$II$ |
|---|---|
| $(a)$ परजीविता | $(i)$ $++$ |
| $(b)$ सहभोजिता | $(ii)$ $+-$ |
| $(c)$ अंतरजातीय परजीविता (अमेन्सलिज्म) | $(iii)$ $0+$ |
| $(d)$ सहोपकारिता | $(iv)$ $0-$ |
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