The correct option is D
fluid surrounding foetus
Amniocentesis is a procedure in which amniotic fluid is removed from the uterus for testing or treatment. Amniotic fluid is the fluid that surrounds and protects a baby during pregnancy. This fluid contains water from the mother's body, but gradually, the larger proportion is made up of the baby's urine. It also contains important nutrients, hormones, and antibodies and it helps protect the baby from bumps and injury.
In amniocentesis, the fluid is taken from the amniotic cavity, which surrounds the foetus and filled with amniotic fluid through a needle. It is also called Amniotic Fluid Test(AFT).
So the correct answer is option D.
The test is for pregnant females who are more prone to genetic disorders or have a family history of birth defects.