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
The oral and pharyngeal phases of swallowing take place very rapidly and last about 
Select and explain. 
A. 3.5 seconds, B. 1-1.5 seconds, C. 6.0 seconds, D. 9.5 seconds
B: 1-1.5 seconds
Answer: B: 1-1.5 seconds 
Explanation: Deglutition is an act of swallowing, a process by which food is passed from mouth into stomach. It occurs in 3 stages,

Oral stage - voluntary
Pharyngeal stage - involuntary
Oesophageal stage - involuntary

The whole process of swallowing through oral and pharyngeal stage takes place within 1-2 seconds.