Which milestone is least likely to be achieved by around 6 months of age?

• A. Rolling over.
• B. Sitting without support.
• C. Reaching for objects.
• D. Crawling.

Answer: (D)

By around six months, infants typically show a progression in gross motor skills: rolling over, sitting with support, and reaching for objects become more established, while crawling usually hasn’t appeared yet. Rolling over tends to occur earlier in the first half-year, with babies often rolling from tummy to back first and then back to tummy. Sitting with support appears next and, by about six months, many babies can sit for short periods with assistance. Reaching for and grasping objects becomes more purposeful as their arms gain strength and coordination. Crawling, on the other hand, generally emerges later, often around seven to ten months, so it is less likely to be achieved by six months.