UKMLA PLAB AMC USMLE Prometric MCQ

a) on MR the serous fluid appears of high intensity on T2-weighted MR
b) malignant degeneration occurs in less than 5%
c) is purely cystic in less than 30%
d) a dermoid plug is seen in over 50%
e) is an uncommon cause of a pedaitric ovarian tumour