VPY-0093
QUESTION
Which excretory material is least toxic?
OPTIONS
(A) Ammonia
(B) Urea
(C) Uric Acid
(D) Trimethyl amine oxide
ANSWER
(C) Uric Acid
EXPLANATION
Uric acid is the correct option because uric acid is relatively insoluble and can be excreted with minimal water loss, making it the least toxic of the common nitrogenous waste products listed. Ammonia is highly toxic, urea is less toxic than ammonia but more soluble, and trimethylamine oxide is not the standard principal nitrogenous waste product used for this comparison.
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