At birth, the sense of hearing is better developed than vision, with infants able to recognize sounds and voices. Though less developed, smell and touch are more advanced than vision. Therefore, hearing is more functional in newborns than sight. ;
At birth, the sense of hearing is better developed than vision, making option (a) the correct answer. Newborns can recognize voices and sounds, while their visual capabilities are limited. Touch and smell are also functional, but vision is the least developed sense at this stage.
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