<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A tall, 25-year-old man is brought to the ED by his friend after sudden difficulty breathing while smoking a cigarette. In the trauma bay he is tachypneic, but able to talk to you. Vital signs show that he is afebrile and tachycardic with blood pressure of 11560. Physical exam reveals hyperresonance and absent breath sounds over the left upper lung. A chest x-ray is obtained and shown below. What is the most likely diagnosis?? A: Tension pneumothorax, B: Left lower lobe pneumonia, C: Left upper lobe cavitation, D: Spontaneous pneumothorax, E: Nondiagnostic, further imaging required,  <response>: Based on the information provided in the question stem, the key findings are:- 25-year-old man - Sudden difficulty breathing while smoking- Tachypneic, able to talk - Afebrile, tachycardic - Hyperresonance and absent breath sounds over left upper lung- Chest X-ray shows hyperlucency of the left upper lung fieldThe chest X-ray findings of hyperlucency of the left upper lung field along with physical exam findings of hyperresonance and absent breath sounds over the left upper lung point towards a diagnosis of pneumothorax affecting the left upper lung. The provided history of sudden onset of symptoms while smoking also supports a diagnosis of spontaneous pneumothorax. The young age of the patient makes pneumothorax more likely than other diagnoses like pneumonia or lung cavitation.Of the choices provided, choice D of spontaneous pneumothorax is most consistent with the clinical presentation.D: Spontaneous pneumothorax 