Kwashiorkor is a disease caused by

The correct option is B

deficiency of nutrients

The explanation for the Correct answer

Correct Option B

1. Kwashiorkor is a severe form of malnutrition.
2. It's most common in some developing regions where babies and children do not get enough protein or other essential nutrients in their diet.
3. The main sign of kwashiorkor is too much fluid in the body's tissues, which causes swelling under the skin.

The explanation for an incorrect answer

Incorrect Option A: Microbes are microscopic agents for various diseases such as typhoid, dengue, etc.

Incorrect Option C: Enviourment does not lead to deficiency disease symptoms.

Incorrect Option D: Defects in the human body lead to a deficiency disease.

Final Answer: Kwashiorkor is a severe form of malnutrition. Hence option B is correct.