The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Most commonly used technique for determination of working length of a 8 year old  child patient of teeth maxillary central incisor:   (A) Tactile sensation   (B) Moisture on paperpoint   (C) Digital   (D) None
['(B) Moisture on paperpoint <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Tactile sensation \n (B) Moisture on paperpoint \n (C) Digital \n (D) None <> possible answers', '  Most commonly used technique for determination of working length of a 8 year old  child patient of teeth maxillary central incisor: <> context@']