increased lymphocytes indicates what?\nbacterial infection\nviral infection\nparasites\nallergies

Brief Explanations:

Lymphocytes are a type of white - blood cell important in the immune response. An increase in lymphocytes is often associated with viral infections as they play a key role in fighting off viruses. Bacterial infections usually cause an increase in other types of white - blood cells like neutrophils. Parasites typically lead to an increase in eosinophils, and allergies are associated with an increase in basophils and eosinophils.

Answer:

B. viral infection