Jean Piaget studied cognitive development among children of different age groups in different developmental stages, According to Piaget, development is based on Physical environment and Biological abilities, he ignores social Aspects.According to Jean Piaget: Formal operational Stage (11+ years to adolescence)?Development of creative thinking and Hypothetical-deductions takes place in the life of a child.And in option (2), If A is greater than B and B is greater than C. What is the relation between A and C?, that's why option (2) is correct.Additional Information The rest three stages of Jean Piaget are:Sensorimotor stage: (birth to 2 years)Pre-operational stage: (2 to 6 years)Concrete operational stage: (6 to 11 years).