input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Binder in investment for dental castings:   (A) Brings about reduction in expansion   (B) Provides adequate strength to the investment, holds ingredients together and provides rigidity   (C) Is usually a form of silica   (D) Can be safely heated above 700°C when present in the form of gypsum
output: ['(B) Provides adequate strength to the investment, holds ingredients together and provides rigidity <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Brings about reduction in expansion  (B) Provides adequate strength to the investment, holds ingredients together and provides rigidity  (C) Is usually a form of silica  (D) Can be safely heated above 700°C when present in the form of gypsum <> possible answers', '  Binder in investment for dental castings: <> context']