Noninvasive prenatal testing (NIPT): (A) Preconceptional gene testing on ova, (B) Testing on maternal tissue, (C) Maternal serum for evaluation of Down’s syndrome, (D) Amniocentesis for evaluation of fetal chromosomal anomalies
Answer is C. Ref. The Short Textbook of Obstetrics. Page. 778
 
NON INVASIVE PRENATAL TESTING

Targeted ultrasonography
Fetal blood cells in maternal blood
Double marker and triple screening
Maternal serum estriol

INVASIVE PRENATAL TESTING

Amniocentesis
Chronic villus sampling
Cordocentesis