[Solved] Which one is true?

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Q.	Which one is true?
A.	symbiosis when neither population affects each other
B.	symbiosis when the interaction is useful to both the populations
C.	commensalism when none of the interacting populations affect each other
D.	commensalism when the interaction is useful to both the populations
Answer» B. symbiosis when the interaction is useful to both the populations

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Environmental Science and Ecology

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