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[A] : When the organisms live together i...

[A] : When the organisms live together in such a manner that one organism benefitted , while other has no effects , it is called commensalism .
[R] : In commensalism one partner derives benefit from the other partner without in any way benefitting or harming it .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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