<prompt> A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have:Greater ductilityGreater toughnessA higher modulus of elasticityMore resistance to permanent deformation  <response>: Proportional limitMagnitude of elastic stress above which plastic deformation occurs.A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have more resistance to permanent deformation.Reference: PHILLIPS SCIENCE OF DENTAL MATERIALS, 12th ed page no 48 