This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Anatomy
[{'content': 'Which statement is true regarding Ventouse (vacuum extractor) : \nSelect and explain. \nA. Minor scalp abrasion and Subgaleal hematomas in newborn are more frequent than forceps, B. Can be applied when fetal head is above the level of ischial spine, C. Maternal trauma is more frequent than forceps, D. Cannot be used when fetal head is not fully rotated', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Maternal trauma is less in vacuum than in forceps. Vacuum promote autorotation. So, it can be used in unrotated or malrotated occipitoposterior position of the head Ref: Dutta Obs 9e pg 539.', 'role': 'assistant'}]