This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
A normal child has dysfluency of speech between: 
Select and explain. 
A. 2 and 4 years, B. 4 and 6 years, C. 6 and 8 years, D. 8 and 10 years
A: 2 and 4 years
Answer: A: 2 and 4 years 
Explanation: a. 2 and 4 years(Ref: Nelson's 20/e p 65-77, Ghai 8/e p 52-53)Language development occurs most rapidly between 2 and 5 years of age. The period of rapid language acquisition is also when developmental dysfluency and stuttering are most likely to emerge