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: Dental
Egocentrism and animation is found in the following
stage of cognitive development? 
Select and explain. 
A. Sensorimotor stage, B. Preoperational stage, C. Operational stage, D. Concrete operational
B: Preoperational stage
Answer: B: Preoperational stage 
Explanation: None