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: Physiology
[{'content': 'The oral and pharyngeal phases of swallowing take place very rapidly and last about \nSelect and explain. \nA. 3.5 seconds, B. 1-1.5 seconds, C. 6.0 seconds, D. 9.5 seconds', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Deglutition is an act of swallowing, a process by which food is passed from mouth into stomach. It occurs in 3 stages,\n\nOral stage - voluntary\nPharyngeal stage - involuntary\nOesophageal stage - involuntary\n\nThe whole process of swallowing through oral and pharyngeal stage takes place within 1-2 seconds.', 'role': 'assistant'}]