Secretory component is present in:: (A) IgA, (B) IgG, (C) IgM, (D) All of these
Answer is A. IgA are the secretory antibodies seen in seromucous secretions of gastrointestinal tract, nasopharyngeal tract, urogenital tract, tears, saliva, sweat, etc.,
Reference: Vasudevan 7th  ed, pg 689