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 per vaginal examination, anterior fontanelle and supraobital ridge is felt in the second stage of labour. The presentation is: \nSelect and explain. \nA. Brow presentation, B. Deflexed head, C. Flexed head, D. Face presentation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]