Ans. C. Pregestational DM
The image shows Caudal regression syndrome
This rare anomaly is characterized by the absence of the sacral spine and often portions of the lumbar spine. It is approximately 25 times more common in pregnancies with pregestational diabetes
Sonographic findings include a spine that appears abnormally short, lacks the normal lumbosacral curvature and terminates abruptly above the level of the iliac wings.
Because the sacrum does not lie between the iliac wings, they are abnormally close together and may appear “shield-like.”
There may be abnormal positioning of the lower extremities and a lack of normal soft tissue development.
OBS WILLIAMS ed. 24 page no. 204