<prompt> Ring of fire on USG signifies-H. moleEctopic pregnancyPCODAneuploidy  <response>: Ans. is b i.e., Ectopic pregnancy The ring of fire sign also known as ring of vascularity signifies a hypervascular lesion with peripheral vascularity on colour or pulsed doppler examination of the adnexa due to low impedance high diastolic flow 1. This sign can be seen ini Corpus luteum cyst more commonlyii Ectopic pregnancy 