Dental All of the following statements about cast cobalt alloys are true EXCEPT: A They have a modulus of elasticity twice that of gold alloys. B They are more rigid than gold alloys. C They have higher ductility than gold alloys. D They have a lower proportional limit than gold alloys. 💡 Explanation All of the following statements about cast cobalt alloys are true EXCEPT: ✓ Correct Answer: C. They have higher ductility than gold alloys.