Radiology 20-year-old male with history of RTA presents with breathlessness. Stratosphere sign on USG with M mode is seen. What is the probable diagnosis? A Hemothorax B Pneumothorax C Cardiac tamponade D Pulmonary embolism 💡 Explanation 20-year-old male with history of RTA presents with breathlessness. Stratosphere sign on USG with M mode is seen. What is the probable diagnosis? ✓ Correct Answer: B. Pneumothorax