Sugar adulterated with chalk powder causes
stomach disorder
The correct option is D.
Explanation of correct option:
Once chalk powder is ingested, it can affect the digestive system and can cause stones in the kidneys.
Explanation of incorrect options:
Option A:
Smoking, pollution, and other microbial infection are the cause of chest infections.
Option B:
Obesity is caused by unhealthy eating habits, sometimes hormonal imbalance, and due to some chronic diseases.
Option C:
Final answer: Sugar adulterated with chalk powder causes stomach disease.