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 from List I with their corresponding diseases/sicknesses from List II based on their typical effects on health. Let's examine each pollutant and its associated health risk:

1. Sulphate (> 500 ppm): High levels of sulphate in drinking water can lead to gastrointestinal issues, particularly having a laxative effect on individuals. Therefore, Sulphate is correctly matched with III. Laxative effect.
2. Nitrate (> 50 ppm): Elevated levels of nitrate in water are known to cause methemoglobinemia, commonly known as "blue baby syndrome," due to the reduction of hemoglobin's oxygen-carrying capacity. Hence, Nitrate is matched with I. Methemoglobinemia.
3. Lead (> 50 ppb): Lead exposure can be damaging to the kidneys as well as other organs, but in the context of the given options, the focus is on its ability to cause serious kidney damage. Therefore, Lead should be matched with IV. Kidney damage.
4. Fluoride (> 2 ppm): Excessive intake of fluoride is known to cause dental fluorosis, which appears as brown mottling of teeth. Thus, Fluoride should be matched with II. Brown mottling of teeth.

Based on the above analysis, the correct matches are:

• A-III: Sulphate (> 500 ppm) - Laxative effect
• B-I: Nitrate (> 50 ppm) - Methemoglobinemia
• C-IV: Lead (> 50 ppb) - Kidney damage
• D-II: Fluoride (> 2 ppm) - Brown mottling of teeth

Thus, the correct answer is: A-III, B-I, C-IV, D-II.