input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which material undergoes hysteresis?   (A) Irreversible hydrocolloid   (B) Reversible hydrocolloid   (C) Impression plaster   (D) Metallic oxide paste
output: ['(B) Reversible hydrocolloid <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Irreversible hydrocolloid  (B) Reversible hydrocolloid  (C) Impression plaster  (D) Metallic oxide paste <> possible answers', '  Which material undergoes hysteresis? <> context']