<prompt> Which of the following measures The amount of fetal blood entering maternal circulation:Kleihauer - Betke testSingers testAPT testBenedict test  <response>: To know the exact amount of blood in maternal circulation,KLEIHAUER - BETKE test acid elusion testis done which is a quantitative test To distinguish between maternal and fetal blood in cases of vasa pre APT TEST is done which is a qualitative test. Benedict test is used for checking reducing sugars in the urine 