Study the following diagram and consider the statements in regard to the labels. I. \( A \) is l...

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Study the following diagram and consider the statements in regard to the labels.
I. \( A \) is lined by pseudostratified ciliated columnar epithelium bearing glandular cells and cartilaginous ring.
II. \( B \) is the part of lung where major exchange of gases takes place.
III. \( C \) decreases both in diameter and thickness as it gets divided.
IV. \( D \) is the part of lung where exchange of gases does not take place.
Choose the correct set of statements.
(A) I, II and III
(B) I and III
(C) II, III and IV
(D) II and IV
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