What Is the Physiological Difference Between "Old Bronchopulmonary Dysplasia (BPD)

What is the physiological difference between "old bronchopulmonary dysplasia (BPD) " and "new BPD"
I.Old BPD was a direct result of injury to the lung as a result of oxygen and mechanical ventilation.
II.New BPD is Considered a developmental delay or arrest of lung tissue.
III.There is no difference between the two terms; it is just a revision of terminology.
IV.Old BPD occurs in infants under 1,500 g requiring mechanical ventilation and new BPD has been eliminated as a result of surfactant use.

A) I only
B) II only
C) III only
D) I and II
E) II and IV

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