Mechanism of uric acid excretion in a nephron is

Osmosis

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Diffusion

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Ultrafiltration

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Secretion

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Solution

The correct option is C Ultrafiltration
Uric acid in the blood is filtered (ultrafiltration) from the glomeruli of the nephrons in the kidneys. Though filtration is almost 100% only 10% is excreted through the urine. 90% of it is re absorbed by the various parts of the tubule. Thus, the correct option is C.

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