Demonstrate how you can reveal presence of arsenic in unknown compound​

Your body does not easily absorb fish arsenic and it leaves your body through the urine. The most reliable way to test for recent arsenic exposure is through a urine test. If you had a fish meal or ate fish supplements within a few days of having a urine test, the test may show a high level of arsenic.

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The answer is tea due to the main ingredient being a herb that grows from the ground and sugar that grows from a stalk, i hope this : )     p.s.  can i be brainliest?