This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Radiology, Subject name: Radiology
Golden S is seen in 
Select and explain. 
A. Left upper lobe collapse, B. Pleural Effusion, C. Left lower lobe collapse, D. Bronchogenic carcinoma
D: Bronchogenic carcinoma
Answer: D: Bronchogenic carcinoma 
Explanation: Golden "S" sign is a Reverse "S" sign seen on Frontal Chest Radiograph In patients with Bronchogenic Ca with Right Upper lobe collapse Lower convexity of the Reverse S is due to the mass Upper concavity of the "S" is due to Right UPPER LOBE atelectasis with the upward shifting of the horizontal fissure.