What immunoglobulin is primarily found in secretions and has a primary function of providing local immunity on mucosal surfaces?

IgA Or immunoglobulin A

Explanation:

Immunoglobulins are the class of proteins that provide protection to the humans against the invading pathogens called antigens and thus are also named the antibodies.

These antibodies are secreted by the plasma cells and are found in five forms in which each form has a specific role in providing immunity.

The IgA is the immunoglobulin which accounts for about 15% of all the antibodies as it is found in the tears, saliva, gastrointestinal and vaginal secretions. The IgA provides protection on mucous surfaces.

Thus, IgA is the correct answer.