<prompt> Social smile is attained at what age?2 months5 months9 months1 year  <response>: Ans. is a i.e., 2 months Social smile develops at 2 months. Other milestones that develop at 2 months of age In ventral suspension, lifts his head in the horizontal plane in the plane of the body. Follows object with steady movements of eye. In prone position face is lifted to about 45deg. 