<prompt> Development examination should be fuher evaluated in child of 12 weeks if he ?Does not vocalizeDoes not babbleDoes not change bright red ring from one hand to other even if given in handDoes not hold head at 90deg  <response>: Ans. is a i.e., Does not vocalize o Vocalization develops by 4 weeks. o Babbling develops by 7 months o A child transfer the objects from one hand to another by 5-7 months. o A child can hold head at 90deg above horizontal plane in ventral suspension by 3 months -- Neck holding develops by 3 months. 