This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Developmental-Behavioral Screening and Surveillance, Subject name: Pediatrics
All of the following are milestones at 7 months except- 
Select and explain. 
A. Building a tower of 2 cubes, B. Stranger anxiety, C. Babbling, D. Resistance on toy being pulled from hand
A: Building a tower of 2 cubes
Answer: A: Building a tower of 2 cubes 
Explanation: Ans. is 'a' i.e., Building a tower of 2 cubes AgeMilestone# 7 months# Holds the objects with crude grasp from palm (palmar grasp)# Pivots# Shows strangers anxiety# Resists if a toy is pulled from his hand.# Babbles