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: Dental
In anxious parent calls you that her 4-month-old child has still no teeth in his mouth then you should: 
Select and explain. 
A. Call and do radiographic survey, B. Tell her that it is normal at this age, C. Child has retarded growth, D. Systemic problem
B: Tell her that it is normal at this age
Answer: B: Tell her that it is normal at this age 
Explanation: None