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Surfactant

(A) is a polysaccharide produced by Type 1 alveolar cells

(B) is excessive in many premature infants resulting in difficulties in breathing

(C) decrease the surface tension of the fluid lining the alveoli

(D) secretion is decreased when a deep breath is taken.

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Surfactant decreases the surface tension of the fluid lining the alveoli.

So, The correct option is (C).

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