MCQ PracticeThe combination of primary and secondary treatment reduces the original sewage BOD bySubject: Biotechnology EngineeringTopic: Environmental BiotechnologyA30 - 40%B50 - 60%C60 -70%D80 - 90%Correct Answer: CPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the