Biology · Immunology
Which of the following statements are correct regarding Immunoglobulin A (IgA)? (A) IgA is the main class of antibody in secretions such as tears and saliva. (B) IgA is also found in the secretions of lungs and intestine. (C) IgA is the first line of defense against infection at these mucosal sites. (D) IgA is the main immunoglobulin in the bloodstream late in the primary immune response. Choose the correct answer from the options given below:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(B), (C) and (D) only
- 2(A), (B), (C) and (D)
- 3(A), (B) and (C) only✓
- 4(A), (B) and (D) only
Correct answer
(A), (B) and (C) only
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