Given below are two statements with respect to counter current mechanism.
Statement-I: Tissue fluid around descending limb of Henle's loop becomes concentrated, during counter current mechanism.
Statement-II: Water moves out from descending limb of Henle's loop into tissue fluid by osmosis.
In the light of above statements select the correct option from codes given below:

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.