Q. Blue baby disease is caused in infants due to drinking water,containing higher concentrations of:

A
Nitrates
B
Cadmium
C
Sulphides
D
Chlorides
Solution:

Nitrates from polluted drinking water form compounds in the body that change haemoglobin to methemoglobin, decreasing the ability of blood to carry oxygen. The lips turn blue as a symptom.

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