A 40-week-old infant can do all the following except:: (A) Waves bye bye, (B) Transfer object from one hand to another, (C) Sits without support, (D) Makes a tower of 3-4 cubes
Answer is D. d. Makes a tower of 3--4 cubes(Ref: Nelson's 20/e p 65-77, Ghai 8/e p 52-54)40 week old infant is around 10 months old; Tower of 3-4 cubes comes by around 18 months age.