alleryThe main excretory organ in humans is the
ALiver only
BLung only
CSkin only
DKidney
Answer & Solution
Correct answer: D. Kidney
1. The chapter section on excretory system lists organs.
2. Lungs excrete CO2, skin excretes some salts.
3. But the main organ for nitrogenous waste is the kidney.
4. So option A is correct.
_Source: Selina Concise Biology Class 10, Ch 8 The Excretory System (Mistral OCR'd PDF), section on excretory system_
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