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
NOT a feature of pleural effusion: September 2012 
Select and explain. 
A. Horizontal fluid level, B. Low lung volume, C. Muffled hea sounds, D. Decreased chest movements
A: Horizontal fluid level
Answer: A: Horizontal fluid level 
Explanation: Ans. A i.e. Horizontal fluid level