Formation of non-functional methaemoglobin causes blue-baby syndrome. This is due to
excess arsenic in drinking water
excess nitrates in drinking water
deficiency of iron in food
increased methane content in the atmosphere
The correct option is D excess nitrates in drinking water
After a baby drinks formula made with nitrate-rich water, the body converts the nitrates into nitrites. These nitrites bind to the hemoglobin in the body, forming methemoglobin, which is unable to carry oxygen. When the blood is unable to carry oxygen around the body, the baby turns blue. The disorder is called methaemoglobinea. It causes blue baby syndrome and breathlessness in adults.