Consider the following statements and choose the correct option. (i) Flame cells are excretory s...

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Consider the following statements and choose the correct option.
(i) Flame cells are excretory structures in flatworms.
(ii) Green glands are excretory organs in annelids.
(iii) Columns of Bertini are the conical projections of renal pelvis into renal medulla between the renal pyramids.
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