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: Unknown
Regarding extra uterine endometriosis, false is: 
Select and explain. 
A. It is hormone dependent, B. May involve pleura and lung, C. Commonest site is ovary, D. Ovary contains cyst with clear fluid
D: Ovary contains cyst with clear fluid
Answer: D: Ovary contains cyst with clear fluid 
Explanation: Endometriosis-Incidence is 10%. It is defined as presence of functioning uterine glands and stroma in any site outside the uterus. It is responsive to ovarian hormones.
Pathologically characterized by red disk, bluish or blackish cystic areas-Scarring gives puckered look.
Most important finding is chocolate cysts of ovary (2cm in diameter to size of foetal head) with hemosiderin laden pseudoxanthoma cells.