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Question

Wastewater from toilets is generally in colour, whereas from household activities is in colour.

A
black
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B
orange
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C
blue
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D
grey
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Solution

The correct option is D grey
Wastewater from toilets are generally in black colour due to the presence of dirt and human fecus. Household wastewater are grey in colour and the variation in colour is very light compared to wastewater from toilets.

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