Which salivary protein is responsible for inhibiting the transmission of HIV through saliva?

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Peroxidase enzyme in salivaImmunoglobulin A secreted in salivaLeukocyte proteinase inhibitor found in salivaProteins rich in histidine amino acids

Explanation

Among the salivary components, the salivary leukocyte proteinase inhibitor plays a key role in preventing the transmission of the human immunodeficiency virus via saliva, whereas other proteins like sialoperoxidase, secretory IgA, and histidine-rich proteins do not provide this specific antiviral function.