<prompt> Definition of childhood is under what age?8 years10 years12 years16 years  <response>: ANSWER: C 12 yearsREF: Nelson Textbook of Paediatrics 17th edition different pagesInfancy0-1 yrToddlerhood1-3 yrEarly childhood toddlerhood and some time afterwards1-4 yrMiddle Childhood School Age6-12 yrPreschool2-5 yrAdolescence onset of puberty to maturity12-20 yrAdulthood full physical and intellectual maturity20-21 yr onwards 