Most frequent chromosomal abnormality found in those with heart defect: (A) Trisomy 13, (B) Trisomy 21, (C) Trisomy 18, (D) Monosomy X
Answer is B. Trisomy 21 >> Trisomy 18 >> 22q Microdeletion >> Trisomy 13 >> monosomy X.
This is order of occurrence of heart defect most commonly and frequently.