<prompt> A 45 year old patient presents with history of fever, night sweats and weight loss. On X-ray, a mass in apical lobe of lung is seen. On histopathology, it was found to have caseous necrosis. What is the likely underlying process involved -Enzymatic degenerationHypersensitivity reaction with modified macrophages, lymphocytes and giant cellsAcute decrease in blood supplyDecreased supply of growth factors  <response>: . Hypersensitivity reaction with modified macrophages, lymphocytes and giant cells 