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: Pathology
Primary pleural tumor is -a)  Mesotheliomab)  Myxomac)  Lipomad)  Fibroma 
Select and explain. 
A. b, B. c, C. ac, D. ad
D: ad
Answer: D: ad 
Explanation: Pleural tumors 

The pleura may be involved by primary or secondary tumors.
1. Primary tumors
Benign    → Solitary fibrous tumor (benign fibrous mesothelioma or benign mesothelioma or pleural fibroma).
Malignant →  Malignant mesothelioma.
2.   Secondary tumors
More common than primary tumors.
Most common primary sites are lung and breast.