Match List I with List II.
List IList IIPollutantDisease/sicknessSulphate (>500 ppm)I. MethemoglobinemiaNitrate (>50 ppm)II. Brown mottling of teethLead (>50 ppb)III. Laxative effectFluoride (>2 ppm)IV. Kidney damage
Choose, the correct answer from the options given below: