This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
A 53-year-old woman with ovarian tumor presents with breathlessness and right-sided chest pain. The chest X-ray shows obliteration of the right costophrenic angle. Diagnosis? 
Select and explain. 
A. Pleurisy, B. Pericarditis, C. Myocardial infarction, D. Parapneumonic effusion
A: Pleurisy
Answer: A: Pleurisy 
Explanation: Ans. A PleurisyRef. CMDT 2019 pg. 323Ovarian tumor (Fibroma and thecoma) can be associated with a right-sided pleural effusion (Meigs syndrome). The obliteration of CP angle on X-ray is another pointer for pleural involvement of this patient.