This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - normal, abnormal, malposition, malpresentation and their management, Subject name: Gynaecology & Obstetrics
[{'content': 'On per vaginal examination, anterior fontanelle and supra-orbital ridge is felt in the second stage of labor. The presentation is: \nSelect and explain. \nA. Brow, B. Shoulder, C. Veex, D. Face', 'role': 'user'}, {'content': 'Answer: A \nExplanation: BROW PRESENTATION The diameter of engagement is MentoVeical which is 14 cms Occurs in a deflexed head Supraorbital ridges and anterior fontanelle is palpable Occiput is higher than sinciput No mechanism of labour as a mentoveical diameter. Delivery is by cesarean section', 'role': 'assistant'}]