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
Black colored pleural effusion is seen in: 
Select and explain. 
A. Anaerobic empyema, B. Pseudochylothorax, C. Amebic liver abscess, D. Aspergillus infection
D: Aspergillus infection
Answer: D: Aspergillus infection 
Explanation: Type of pleural effusion and appearance: Pseudochylothorax and chylothorax- Milky white Urinothorax- Urine Anaerobic empyema-Putrid Chylothorax-Bile stained Aspergillus infection-Black Empyema-Turbid Amebic liver abscess-"Anchovy" brown Esophageal rupture-Food paicles Ref: AJCC AMERICAN JOURNAL OF CRITICAL CARE, March 2011, Volume 20, No. 2