Question

Formation of non functional methaemoglobin causes blue baby syndrome. This is due to

• A. Excess of arsenic in drinking water
• B. Excess of nitrate in drinking water
• C. Deficiency of iron in food
• D. Increased methane content in atmosphere

Answer 1

The correct option is B Excess of nitrate in drinking water

Nitrate is most common groundwater contaminant which originates generally from agricultural fertilisers, manure storage etc. Nitrate with chemical formula NO${}_3$ is an inorganic compound. Excess of nitrate in water can cause 'blue baby syndrome' as infants consume water more than their body weight, The haemoglobin in blood which carries oxygen in converted to methaemoglobin losing its ability to carry oxygen. It cause digestive and respiratory problems in babies, at higher levels symptoms of cyanosis can occur.

So, the correct answer is 'Excess of nitrate in drinking water'