Question

Knock knee syndrome is caused by-

• A. Fluoride pollution
• B. Lead pollution
• C. Mercury pollution
• D. Arsenic pollution

Answer 1

The correct option is A

Fluoride pollution

The correct option is A.

Explanation of the correct option:

Knock knee:

1. It is a condition in which the knees bend towards the inside whereas the ankles remain separated.
2. It is also known as Genu valgum.

Causes of knock knee disease-

1. Rickets
2. Benign bone tumor
3. Injury
4. Bone infection
5. Arthritis in the knee
6. Fluoride poisoning

Fluoride poisoning:

Fluoride poisoning or pollution of fluoride means accumulation of fluoride inside the body which can cause the deficiency of vitamin D and thus, it might lead to knock knee syndrome.

Explanation of the incorrect options:

Option B:

Lead pollution: When an excess amount of lead gets deposited in our body it causes a delay in the growth and development, abdominal pain, neurological changes, etc.

Option C

Mercury pollution: Accumulation of mercury inside the body causes neurological damage, impaired motor skills, and other related issues.

Option D:

Arsenic pollution: Arsenic is extremely harmful to the body, its accumulation in the body mainly affects the liver, lungs, kidneys, and skin, it might also lead to coma or death.

Final answer: Knock knee syndrome is caused by fluoride pollution.