Knock knee syndrome is caused by (1) fluoride pollution (2) lead pollution (3) mercury pollution (4) arsenic pollution

Answer: (1)

Knock knee syndrome is caused by Fluoride pollution. The knock knee syndrome is also called as rickets or Genu Valgum, may also cause vitamins D deficiency.

Symptoms of knock knee syndrome:

Both the knees get touched and bent in the case of Knock knee syndrome where other parts of the legs are straight.

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