Question

Match List I with List II.

List I Pollutant	List II Disease/ sickness
A. Sulphate (> 500 ppm)	I. Methemoglobinemia
B. Nitrate (> 50 ppm)	II. Brown mottling of teeth
C. Lead (> 50 ppb)	III. Laxative effect
D. Fluoride (> 2ppm)	IV. Kidney damage

Choose the coned answer from the options given below:

• A. A-IV, B-I, C-II, D-III
• B. A-III, B-I, C-IV, D-II
• C. A-II, B-IV, C-I, D-III
• D. A-II, B-IV, C-III, D-I

Answer 1

The Correct Option is B

To solve this question, we need to match pollutants in List I with their associated diseases or symptoms in List II. Let us analyze each pairing:

1. A. Sulphate (> 500 ppm) is associated with a laxative effect. High concentrations of sulphate in water can cause diarrhea and dehydration, particularly affecting sensitive individuals. 
2. B. Nitrate (> 50 ppm) is linked to methemoglobinemia. This condition, often known as "blue baby syndrome," occurs when nitrate in water is converted to nitrite in the body, interfering with the capacity of blood to carry oxygen.
3. C. Lead (> 50 ppb) can cause kidney damage. Lead exposure, even at low levels, can harm the kidneys and affect other physiological processes as well.
4. D. Fluoride (> 2 ppm) leads to brown mottling of teeth, known as dental fluorosis. Excessive fluoride exposure results in discoloration and damage to dental enamel.

Based on these explanations, the correct matchings are:

• A-III: Sulphate - Laxative effect
• B-I: Nitrate - Methemoglobinemia
• C-IV: Lead - Kidney damage
• D-II: Fluoride - Brown mottling of teeth

The correct option is therefore

A-III, B-I, C-IV, D-II

.