This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Right hemithorax with right side shift of mediastinum is due to - 
Select and explain. 
A. Collapse of Rt lung, B. Right side hemothorax, C. Hydrothorax Rt sided, D. Bronchiectasis
A: Collapse of Rt lung
Answer: A: Collapse of Rt lung 
Explanation: None