input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Cumulative index is:   (A) Russet's periodontal index   (B) Ramjford's periodontal index   (C) PMA (Massler and Schlour)   (D) Gingival index (Loe and Silness)
output: ['(C) PMA (Massler and Schlour) <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', "(A) Russet's periodontal index  (B) Ramjford's periodontal index  (C) PMA (Massler and Schlour)  (D) Gingival index (Loe and Silness) <> possible answers", '  Cumulative index is: <> context']