MCQ PracticeThe law which is very useful in determining the best use of limited resources isSubject: AgricultureTopic: Agricultural EconomicsALaw of substitutionBLaw of diminishing returnCLaw of opportunity costDNone of theseCorrect 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