26Structural Geometric IsomerismMedium1 markWhich pair of molecules are positional isomers?ACH3CH2CH2CH3 and CH3CH(CH3)CH3BCH3CH2CHClCH3 and CH3CH2CH2CH2ClCCH3CH2CH2CHO and CH3CH2COCH3DCH2=CHCH2CH3 and CH3CH2CH=CH2Grade answerSolutionGrading criteria