Final answer:
In the case of a dysmature or postdate infant, the characteristic not associated with this condition is smooth skin. Such infants often display signs like peeling skin, long nails, meconium-stained skin, and fragility but not smooth skin.
Step-by-step explanation:
An infant described as looking like an old man and having a gestational age of greater than 43 weeks is referred to as a dysmature or postdate infant. Such infants are at risk of certain characteristics due to being over term. Of the options provided, smooth skin is not typically associated with dysmature infants. Dysmature infants typically show signs of peeling skin, which indicates that they have been in the amniotic fluid beyond the normal term, and long nails due to the extended gestational period.
Additionally, these infants are often meconium-stained due to stress and possible meconium passage in utero, and they have fragile skin and bodies because of being in a limited nutrient environment for longer than expected. Therefore, the correct answer is B. Smooth skin, as it is not a characteristic of postdate infants who typically display the opposite -- leathery and cracked skin from prolonged exposure to amniotic fluid.