Thirteen pair of Ribs are seen in ?
a) Down syndrome
b) Holt oram
c) Turner
d) Fibrous dysplasia
Correct Answer - A
Answer- A. Down syndrome
7 pair Trisomy 21, cleidocranial dysplasia
11 pair Trisomy 18,21
13 pair Trisomy 21
14 pair VATER Syndrome
[Ref Abnormal number of fetal ribs in USG by Liat Gindes et.al.]