Assertion (A): Human body produces highly toxic substances, which if not eliminated may cause death.  

Reason (R): Excretory substances remove nitrogenous waste from the body.  




  • Excretion is the process which involves the removal of harmful metabolic wastes from the  body.
  • If these harmful wastes are not removed from the body, then it may cause the death of the organism.  
  • Excretory substances include amino acids, urea, uric acid, carbon dioxide, water, and ammonia .
  • They remove nitrogenous waste from the body.

The Human Excretory System-01.jpg


  • The assertion is True
  • The reason is True

But the reason is not the correct explanation of the assertion

So, the correct answer is (b)

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo