Question

Knock knee syndrome is caused by A)fluoride pollution B)lead pollution C)mercury pollution D)arsenic pollution

Answer 1

a] fluoride pollution ..

is the answer

hope it helps ..^_^

Answer 2

Answer:

Knock knee syndrome is caused by Fluoride pollution.

Explanation:

Knock knee syndrome is caused by Fluoride pollution.

This is also called as rickets and may also be caused by the lack of vitamin D.

In the case of Knock knee syndrome both the knees get touched and curved where other parts of legs are straight.