<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: A normally developing 10 months old child should be able to do all of the following except –
Options:
A. Stand alone
B. Play peak to boo
C. Pick up a pellet with thumb and index finger
D. Build a tower of 3–4 cubes
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is D: Build a tower of 3–4 cubes. Explanation: A child starts trying to build a tower of cubes (2 cubes) by the age of 1 year.

About other options

Child can stand with support by 9 months.
Child can play peak-a-boo game by 10 months.
Child can pick up a pellet with thumb and index finger (pincer grasp) by 9 months.<|im_end|>
