The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Heavy and light body impression materials are used with:   (A) Mercaptan   (B) Silicone   (C) Reversible hydrocolloid   (D) 1 and 2
['(D) 1 and 2 <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Mercaptan \n (B) Silicone \n (C) Reversible hydrocolloid \n (D) 1 and 2 <> possible answers', '  Heavy and light body impression materials are used with: <> context@']