<prompt> Which of the following is false regarding cell free DNADetected in maternal bloodPrenatal diagnosis of Downs syndrome can be madeUsed for liquid biopsyIt is one of the invasive techniques for prenatal diagnosis of certain genetic diseases  <response>: Prenatal diagnosis can be made by invasive and non invasive techniques.Invasive techniques include aminocentesis, chorionic villous sampling, cord blood sampling. Cell free DNA is a non invasive method. 