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': 'Cardinal movements of labour are : \nSelect and explain. \nA. Engagement → descent → flexion → internal rotation → extension → restitution → external rotation → expulsion, B. Engagement → flexion → descent → internal rotation → extension → expulsion, C. Engagement → flexion → descent → external rotation → expulsion, D. Engagement → extension → internal rotation → external rotation → expulsion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]