<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A male infant is born at 27 weeks following premature rupture of membranes and a precipitous labor to a G4P3 female. Given the speed of delivery steroids are not given. Shortly after delivery he develops respiratory distress and the decision is made to administer surfactant replacement therapy. While the components of the surfactant used in surfactant therapy may vary based on institution, what is the main component of pulmonary surfactant produced by type II pneumocytes?? A: Protein S, B: Zinc finger protein, C: Cholesterol, D: Surfactant-associated proteins, E: Phospholipids,  <response>: This is a medical question asking about the main component of pulmonary surfactant produced by type II pneumocytes. It provides a clinical vignette about a premature infant with respiratory distress who is given surfactant replacement therapy. The question asks what the main component of endogenous pulmonary surfactant is.To answer this, we need to know the composition of pulmonary surfactant. Endogenous pulmonary surfactant is composed mainly of phospholipids, with smaller amounts of surfactant proteins. Phospholipids make up 80-90 of pulmonary surfactant and are responsible for reducing surface tension in the alveoli. The surfactant proteins aid in the adsorption and spreading of the phospholipids.Of the answer choices, phospholipids are the main component of endogenous pulmonary surfactant produced by type II pneumocytes. The other choices refer to minor components or unrelated substances.E: Phospholipids 