No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Fluorides
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Nitrates
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Phosphates
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is B Fluorides
Knock-Knee is also known as the Genu Valgum is a condition of knees angle in when the legs are straightened. A person with Knock-Knee syndrome can not able to touch their feet each other while both legs are straightened simultaneously. Knock-knee is a result of a high intake of raw metals through the water like silica and fluoride. In taking polluted groundwater may result in Knock-Knee syndrome. Excess of fluorides in drinking water can cause neuromuscular disorders, teeth deformity, hardening of bones, painful joints & outward bending of legs from knees (Knock knee syndrome).