Indicate the correct statement
(a) Amniocentesis is a prenatal technique used to detect any chromosomal abnormalities in the foetus.
(b) Amniocentesis is used to measure heart rate of foetus in the uterus.
(c) Amniocentesis is used to measure the kidney function in foetus.
(d) Amniocentesis is used to measure blood flow from mother to foetus.