Sitting erect without support is usually achieved by about how many months?

• A. 4 months
• B. 6 months
• C. 8 months
• D. 10 months

Answer: (C)

Sitting erect without support reflects the development of trunk strength, balance, and postural control. Infants progress from head control to a stable core, first sitting with support and then gradually maintaining an upright posture on their own. By about eight months, many babies can sit independently with a straight spine and hips weight-bearing, leaving their hands free for play and exploration. There is normal variation, with some achieving this a bit earlier or later, but eight months is a common milestone. If a child isn’t able to sit independently by this age, it may indicate a motor delay and warrant further evaluation.