This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
All the following adverse outcomes are associated with post-term pregnancy except 
Select and explain. 
A. Still bih, B. Shoulder dystocia, C. Polyhydramnios, D. Meconium aspiration
C: Polyhydramnios
Answer: C: Polyhydramnios 
Explanation: Adverse Maternal and Perinatal Outcomes Associated with Postterm PregnancyMaternalPerinatalFetal macrosomiaStillbihOligohydramniosPostmaturity syndromePreeclampsiaNICU admissionCesarean deliveryMeconium aspirationDystociaNeonatal convulsionsFetal jeopardyHypoxic-ischemic encephalopathyShoulder dystocia Bih injuriesPostpaum haemorrhageChildhood obesityPerineal lacerationsReference: William's Obstetrics; 25th edition; Chapter 43; Postterm pregnancy