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 baby can reaches out to an object and hold it with both hands, can hold neck, but can't sit without suppo. What is the age of the developmental age of the baby? 
Select and explain. 
A. 2 months, B. 3 months, C. 4 months, D. 5 months
D: 5 months
Answer: D: 5 months 
Explanation: In 5 months baby can have intentional reaching with bidextrous grasp and can sit with suppo. By 3 months baby can hold neck. Ref: O.P Ghai, 6th Edition, Pages 44, 45