The following are multiple choice questions (with answers) about medical knowledge.   **Question:** All of these are continuous variables except:   (A) Height in cms   (B) Weight in kg   (C) Blood groups A. B. ABO   (D) Age in years and months
['(C) Blood groups A. B. ABO <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Height in cms \n (B) Weight in kg \n (C) Blood groups A. B. ABO \n (D) Age in years and months <> possible answers', '  All of these are continuous variables except: <> context@']