The correct option is A Amniocentesis
Amniocentesis is a prenatal test in which a small amount of amniotic fluid is removed from the sac and is used for medical testing. It is a procedure in prenatal diagnosis of chromosomal abnormalities and foetal infections and also used for sex determination in which a small amount of amniotic fluid, which contains foetal tissues, is sampled from the amniotic sac surrounding a developing foetus, and the foetal DNA is examined for genetic abnormalities.