A 25 year old woman presents to her physician complaining of chronic cough and shortness of breath. Physical examination is unremarkable. X-ray reveals two opacities at the hilum region of the right lung. The physician recognizes these opacities as enlarged hilar lymph nodes and recommends a frozen-section biopsy of these lymph nodes. Which group are these lymph nodes belonging to? A- Axillary B- Bronchopulmonary C- Parasternal D- Paratracheal E- Superior tracheobronchial Answer
