question: Q:A 72-year-old man presents to his physician’s office with complaints of a cough and painful breathing for the last 2 months. He says that he has also observed a 5 kg (11 lb) weight loss during the past month. He is relatively healthy but the sudden change in his health worries him. Another problem that he has been facing is the swelling of his face and arms at unusual times of the day. He says that the swelling is more prominent when he is supine. He has also lately been experiencing difficulty with his vision. He consumes alcohol occasionally and quit smoking last year following a 25-year history of smoking. On examination, the patient is noted to have distended veins in the chest and arms. His jugular veins are distended. Physical examination shows ptosis of the right eye and miosis of the right pupil. His lungs are clear to auscultation. He is sent for an X-ray for further evaluation of his condition. Which of the following is the most likely site for the detection of the nodule on CT scan?? 
  {'A': 'Left upper lobe', 'B': 'Central hilar region', 'C': 'Right upper lobe', 'D': 'Peripheral bronchial region', 'E': 'Brain stem metastasis'},