The correct option is
D All of the above
The lymph node or lymph gland is a small, bean-shaped organ of the lymphatic system. It occurs in association with the lymphatic vessels. Lymph nodes possess extra lymph, lymphocytes and macrophages. Lymph nodes are important for the proper functioning of the immune system, acting as filters for foreign particles and cancer cells.
So, the correct answer is 'All the above'.