<prompt> Red flag sign in child development if not attained ?Vocalization at 2 monthsWalking at 12 monthsSingle word at 12 monthsStanding alone at 16 month  <response>: Ans. is d i.e., Standing alone at l6 month Red flag sign of child developmentMilestoneAgeNo visual fixation or following by2 monthsNo vocalisation6 monthsNot siting without suppo9-10 monthsNot standing alone16 monthsNot walking alone18 monthsNot single word18 monthsLack of imaginative play3 years 