question_answer

A mother brings son to ground. You ask if the child can walk mother states he hasn't yet walked. At what age group should a child start walking and at what age group should you be worried if the child doesn't walk?

A) 9 months, 12 months

B) 12 months, 18 months

C) 15 months, 18 months

D) 15 months, 2 years