This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Motor Milestones, Subject name: Pediatrics
A baby can follow an object till 180o, can hold neck, can sit with suppo but cannot sit without suppo. The age of the baby is: 
Select and explain. 
A. 1 month, B. 2 months, C. 4 months, D. 6 months
D: 6 months
Answer: D: 6 months 
Explanation: Following an object up to 180deg comes at 2 months, Neck holding comes at 3 months, Sitting with suppo is attained at 6 months; So, the age of this baby is 6 months