Select the correct statements from the following.
(i) Rental papilla is a narrow tip of medullary pyramid
(ii) Rental cortex is red coloured and striated. 
(iii) Longitudinal - circular longitudinal arrangement of smooth muscles is observed with renal pelvis at its origin.
(iv) Ureter is a long, non-muscular hollow tube that communicates with renal pelvis at its origin.

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.