Which statement is true about lymph nodes?a. Cancerous lymph nodes are swollen and tender tothe touch.b. The medulla of a lymph node contains lymphatic nodules.c. Lymph enters the lymph node through afferent lymphaticvessels.d. Lymphatic sinuses are located in the cortex of a lymphnode only.

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A: INTRODUCTION Secondary lymphoid organ This include spleen, lymph node and payers patches.