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The ‘blue baby’ syndrome results from

1. methaemoglobin
2. excess of dissolved oxygen
3. excess of TDS (total dissolved solids)
4. excess of nitrate

Correct answer: methaemoglobin

Solution

The 'blue baby' syndrome is a condition where the skin and mucous membranes turn blue due to a lack of oxygen in the blood. Methaemoglobinemia is a condition where there is an abnormal amount of methaemoglobin in the blood, which can cause this condition.

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