All of the following statements about cast cobalt alloy are true EXCEPT_____________?

A.\tThey have a modulus of elasticity twice that of gold alloys

B.\tThey are more rigid than gold alloys

C.\tThey have higher ductility than gold alloysCorrect Answer

D.\tThey have a lower proportional limit than gold alloys

Correct Option: C.\tThey have higher ductility than gold alloys

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