The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following methods is used for calculation of anatomical dead space?   (A) Xenon dilution technique   (B) Bohler's method   (C) Spirometry   (D) Single breath nitrogen test
['(D) Single breath nitrogen test <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', "(A) Xenon dilution technique \n (B) Bohler's method \n (C) Spirometry \n (D) Single breath nitrogen test <> possible answers", '  Which of the following methods is used for calculation of anatomical dead space? <> context@']