This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth, Development, and Behavior, Subject name: Pediatrics
Which of the following can be done by an 18 months old baby? 
Select and explain. 
A. Making tower of 9 cubes, B. Can use 10 words with meaning, C. Ride tricycle, D. Turn pages of book one at a time
B: Can use 10 words with meaning
Answer: B: Can use 10 words with meaning 
Explanation: Ans. is 'b' i.e., Can use 10 words with meaning * At 18 months, the child can use 10 words with meaning.Other milestones asked in the question are achieved in children older than 18 months* Making a tower of 9 cubes - 30 months* Turn pages of book one at a time - 2 years* Ride tricycle - 3 yearsMilestones achieved at 18 months of age* Starts running (runs stiffy)* Can feed himself from a cup.* Can use 10 words with meaning.* Name pictures* Builds tower of 4 cubes.* Ready for starting toilet training.* Copies parents in task.