This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'On sonography a multigravida found to have oligohydramnios. Which among the following will be associated with this condition? \nSelect and explain. \nA. Oesophageal atresia, B. Spina bifida, C. Cholangioma of placenta, D. Renal agenesis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Congenital Anomalies Associated with Oligohydramnios: Amniotic band syndrome Cardiac: Fallot tetralogy, septal defects Central nervous system: holoprosencephaly, meningocoele, encephalocoele, microcephaly Chromosomal abnormalities: triploidy, trisomy 18, Turner syndrome Cloacal dysgenesis Cystic hygroma Diaphragmatic hernia Genitourinary: renal agenesis, renal dysplasia, urethral obstruction, bladder exstrophy, Meckel-Gruber syndrome, ureteropelvic junction obstruction, prune-belly syndrome Hypothyroidism Skeletal: sirenomelia, sacral agenesis, absent radius, facial clefting TRAP (twin reverse aerial perfusion) sequence Twin-twin transfusion VACTERL (veebral, anal, cardiac, tracheo-esophageal, renal, limb) association Ref: Cunningham F.G., Leveno K.J., Bloom S.L., Hauth J.C., Rouse D.J., Spong C.Y. (2010). Chapter 21. Disorders of Amnionic Fluid Volume. In F.G. Cunningham, K.J. Leveno, S.L. Bloom, J.C. Hauth, D.J. Rouse, C.Y. Spong (Eds), Williams Obstetrics, 23e.', 'role': 'assistant'}]