The correct answer is (b). Fluoride pollution mainly affects teeth.
Fluoride is a naturally occurring mineral that is found in water, soil, and rocks. It is also added to some toothpastes and mouthwashes to help prevent tooth decay. However, too much fluoride can be harmful.
Fluoride can cause a condition called fluorosis, which can discolor and damage teeth. Fluorosis is most common in children who are exposed to high levels of fluoride during their teeth development.
Fluoride can also affect the kidneys. In rare cases, high levels of fluoride can cause kidney stones or kidney damage.
Fluoride can also affect the nervous system. In rare cases, high levels of fluoride can cause seizures, tremors, and other neurological problems.
If you are concerned about fluoride exposure, you should talk to your doctor.