📊 Biology
Q. What causes the mottling of the dental enamel
  • (A) High levels of calcium in the water
  • (B) High levels of fluorides in the water
  • (C) High levels of nitrate in the water
  • (D) High levels of chlorine in water
✅ Correct Answer: (B) High levels of fluorides in the water

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Ram Sharma
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