<prompt> All are true regarding endometriosis, except:Hormone dependent conditionCan involve lung, pleuraContains clear fluidOvary is the most common site  <response>: Whatever the inital genesis of endometriosis its further development depends mainly on estrogen Option a. It can occur anywhere in body, Most common site being ovaryOption d. Can also involve lungs and pleura Option b. In endometriosis ovary contains tarry dark brown fluid due to presence of blood pigments like hemosiderin and cul de sac has yellow brown fluid.Clear fluid is not seen anywhere, So, Option c is incorrect. 