7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer Vermi-processing toilet

    A) is a design of toilet in which human excreta is treated by round worm.

    B) is a design of toilet in which human excreta is treated by earthworm.

    C) Both the above are correct

    D) None of these is correct.

    Correct Answer: B

    Solution :

    is a design of toilet in which human excreta is treated by earthworm.

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