11) A 25-year-old male patient with low fever for 3 months accompanied by cough and blood in sputum for 1 month. Previous history of pleurisy, chest radiograph showed uneven density shadow of the...

11) A 25-year-old male patient with low fever for 3 months accompanied by cough and blood in sputum for 1 month. Previous history of pleurisy, chest radiograph showed uneven density shadow of the right lung apex, EsR 30mm/h, WBC 9.0x109/L. which of the following tests is the most important to determine the diagnosis? A) PPD test B) Sputum test for acid-fast bacili C) Sputum detection of tumor cells D) Sputum bacterial culture E) lung CT