This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Cardinal movements of labour in order \nSelect and explain. \nA. Engagement--Descent--Flexion--Internal Rotation--Extension--Restitution--External Rotation--Expulsion, B. Engagement--Descent--Flexion--Internal Rotation--Restitution--Extension--External Rotation--Expulsion, C. Engagement--Descent--Flexion--Internal Rotation--Extension--External Rotation--Restitution--Expulsion, D. Engagement--Descent--Flexion--Restitution--Internal Rotation--Extension--External Rotation--Expulsion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The cardinal movements of labour are engagement, descent, flexion, internal rotation, extension, restitution, external rotation and expulsion Reference: William&;s Obstetrics; 24th edition; Chapter 22; Normal labour', 'role': 'assistant'}]