<prompt> An 8 week infant can do all the following except:Head controlLift its head upto horizontal line in ventral suspension.Follows red object upto 180 degrees.Social smile.  <response>: Head control :3 months Lift its head upto horizontal line in ventral suspension: 2 months Follows red object upto 180 degrees: 2 months Social smile: 2 months. Ref: Ghai 9 th edition, page 41 to 48. 