Q23 / 180 · AIIMS 2008 · Botany

Assertion : Dimethyl mercury is a highly persistent pollutant that accumulates in food chains. Reason : Mercury pollution is responsible for minamata.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • Correct answer
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

Mercury is an important toxic pollutant. It is changed to water soluble dimethyl mercury which undergoes biomagnification, i.e., accumulates in the body of organisms inhabiting in the water. Eating poisoned animals causes deformity known as minamata disease which is characterized by diarrhoea, impairment of various senses, numbness of lips, blurring of vision, mental dearrangement and death.

Hence, the correct answer is option: 'B'.

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