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Which one of the following is not an excretory product?

Which one of the following is not an excretory product?

A.

Urine

B.

Sweat

C.

Faeces

D.

Salts

E.

Carbon-dioxide

Correct answer is C

The major excretory products are carbon dioxide, excess water, and nitrogenous compounds like ammonia, urea, uric acid.

It is simply a matter of definition. Because feces are basically the remnants, remains, leftovers of food ingested but not digested (hence the remains,) its removal is named egestion.