Which material undergoes hysteresis ?
(A) Irreversible hydrocolloid
(B) Reversible hydrocolloid
(C) Impression plaster
(D) Metallic oxide paste
Which material undergoes hysteresis ?
(A) Irreversible hydrocolloid
(B) Reversible hydrocolloid
(C) Impression plaster
(D) Metallic oxide paste
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