This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Placenta Previa, Subject name: Gynaecology & Obstetrics
[{'content': 'All are true about placenta previa EXCEPT: \nSelect and explain. \nA. Bright red blood loss, B. Painless vaginal bleeding, C. Increased uterine tone, D. Malpresentations usually found', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWER: (C) Increased uterine toneREF: Current Diagnosis & Treatment Obstetrics & Gynecology, 10th edition Chapter 20 Placenta Previa Essentials of DiagnosisSpotting during first and second trimesters.Sudden, painless, profuse bleeding (bright red, clotted blood) in third trimester.Initial cramping in 10% of cases. Abruptio placentaPlacenta previaHistory* Frequent association of preeclampsia or hypertension from any cause* A single attack of vaginal bleeding, which usually continues until delivery* Abdominal pain* No association with preeclampsia* Repeated warning hemorrhages often occurring over a period of weeks* Usually no abdominal painAbdominal Examination* Local uterine tenderness, hypertonic "woody" uterus in a concealed abruption* patient usually in labor* Presenting part often engaged* Presenting part maybe difficult to palpate* Fetal heart sounds often absent* Normal uterine tone and usually no tenderness* Patient rarely in labor* Presenting part above brim, malpresentation usually found* Fetal parts usually palpable* Fetal heart sounds usually presentAncillary aids* placenta demonstrated in upper uterine segment by ultrasound* Placenta demonstrated in lower uterine segment by ultrasoundVaginal examination* Double set-up reveals no placenta within 5 cm of internal os* Double set-up reveals placenta implanted in the lower uterine segment', 'role': 'assistant'}]