This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood Physiology, Subject name: Physiology
Which of the following WBCs is impoant for "mucosal immunity"? 
Select and explain. 
A. Lymphocytes, B. Neutrophils, C. Basophils, D. Eosinophils
A: Lymphocytes
Answer: A: Lymphocytes 
Explanation: Large numbers of lymphocytes are present in the Mucosa of lungs, GI tract and urinary tract where they provide "mucosal immunity". They are weakly phagocytic.