<prompt> Ring of fire on USG signifies?H. moleEctopic pregnancyPCODAneuploidy  <response>: Ans. isbi.e., Ectopic pregnancyThe 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.This sign can be seen inCorpusluteum cyst more commonlyEctopic pregnancy 