QuestionReportPhysics Question on Dimensional AnalysisOne barn is equal toA10−30 m210^{-30}\, m^210−30m2B1028 m210^{28}\, m^21028m2C10−28 m210^{-28}\, m^210−28m2D1030 m210^{30}\, m^21030m2Answer10−28 m210^{-28}\, m^210−28m2ExplanationSolution111 barn =10−28 m2= 10^{-28}\, m^2=10−28m2.