This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Obs), Subject name: Gynaecology & Obstetrics
[{'content': 'Which one of the following foetal functions is the last to be affected \nSelect and explain. \nA. Tone, B. Movement, C. Heart rate reactivity, D. Breathing movements', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Tone', 'role': 'assistant'}]