<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 23-year-old man is brought to the emergency department by a coworker for an injury sustained at work. He works in construction and accidentally shot himself in the chest with a nail gun. Physical examination shows a bleeding wound in the left hemithorax at the level of the 4th intercostal space at the midclavicular line. Which of the following structures is most likely injured in this patient?? A: Right atrium of the heart, B: Superior vena cava, C: Inferior vena cava, D: Left atrium of the heart, E: Left upper lobe of the lung,  <response>: This is a medical question asking about the likely anatomical structure injured based on the description of an accidental nail gun injury to the left chest. The key details are that the injury is in the left hemithorax at the level of the 4th intercostal space in the midclavicular line. This indicates the injury is in the left lateral chest below the level of the heart. The most likely injured structure would be the left lung rather than any cardiac structures given the location.E: Left upper lobe of the lung 