What would likely be noted in a lymph node undergoing hyperplasia?

In a lymph node undergoing hyperplasia, there is an increase in the number of immune cells due to an antigenic stimulus, typically in response to an infection or inflammation. This results in the presence of more effector lymphocytes, which are crucial for mounting an immune response. Effector lymphocytes include activated B cells that produce antibodies and cytotoxic T cells that can kill infected or cancerous cells. Their proliferation during hyperplasia is indicative of the body's attempt to fight off pathogens and improve its immune defense.

In contrast, the absence of leukocytes would indicate dysfunction or severe suppression of the immune response, which is not characteristic of hyperplasia. The predominance of necrotic cells suggests tissue damage and cell death rather than increased cellular activity and proliferation associated with hyperplasia. High levels of myeloid cells might indicate a response to certain infections or conditions, but in the context of lymph node hyperplasia specifically, the notable increase would be in lymphocytes, particularly the effector types involved in adaptive immunity. Thus, option B accurately captures the expected histological changes in a lymph node experiencing hyperplasia.