input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following is function of fluoride flux in soldering process?   (A) It prevents the formation of copper oxide   (B) It prevents the formation of chromium oxide or dissolves chromic oxide layer   (C) It prevents the flow of material in undesirable area   (D) Increases the strength of solder
output: ['(B) It prevents the formation of chromium oxide or dissolves chromic oxide layer <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) It prevents the formation of copper oxide  (B) It prevents the formation of chromium oxide or dissolves chromic oxide layer  (C) It prevents the flow of material in undesirable area  (D) Increases the strength of solder <> possible answers', '  Which of the following is function of fluoride flux in soldering process? <> context']