The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Vulcanization refers to the setting of:   (A) Reversible hydrocolloid   (B) Mercaptan impression material   (C) Zinc phosphate cement   (D) Zinc oxide-eugenol
['(B) Mercaptan impression material <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Reversible hydrocolloid \n (B) Mercaptan impression material \n (C) Zinc phosphate cement \n (D) Zinc oxide-eugenol <> possible answers', '  Vulcanization refers to the setting of: <> context@']