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The counter current mechanism helps to m...

The counter current mechanism helps to maintain a concentration gradient. This gradient helps in -

A

Easy passage of water from medulla to collecting tubule and thereby concentrating urine

B

Easy passage of water from collecting tubule and thereby concentrating urine

C

Easy passage of water from medullary interstitial fluid to collecting tubule and thereby diluting urine

D

Inhibition of passage of water between the collecting tubule and medulla and so isotonic urine is formed

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