Which of the following is the most toxic waste matter and requires lots of water to be flushed out of the body?
A
Urea
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B
Uric acid
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C
Ammonia
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D
Hippuric acid
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Solution
The correct option is C Ammonia Ammonia - one nitrogen per molecule; highly toxic; requires lots of water to flush Urea - two nitrogens per molecule; less toxic; requires less water to flush Uric acid - four nitrogens per molecule; non-toxic; requires very little water to flush