7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer 23) Which of the following is a good practice be followed?

    A) Cooking oil and paint should not be thrown down a drain.

    B) Used tea leaves, solid food and cotton should not be thrown in the drain.

    C) Chemicals like insecticides should not throw in the drain.

    D) All of the above

    Correct Answer: D

    Solution :

    All of the above

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