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: Pediatrics
A newborn baby has a head circumference of 35 ems. at bih, His optimal head circumference will be 43 ems at - 
Select and explain. 
A. 4 months of age, B. 6 months of age, C. 8 months of age, D. 12 months of age
B: 6 months of age
Answer: B: 6 months of age 
Explanation: Ans. is 'b' i.e., 6 months of age o At 6 month of age head circumference is between 40.0-43.5cm.