This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
This milestone is achieved by a child at age of __________ 
Select and explain. 
A. 2 months, B. 3 months, C. 4 months, D. 5 months
A: 2 months
Answer: A: 2 months 
Explanation: Follows moving object (180degrees) develops at 2 months Also at 2 months Smiles on social contact Listens to voice and coos Head sustained in a plane of the body on ventral suspension Ref : Nelson 20th edition pg no : 66