Which sequence correctly describes the early grasp developmental progression?

• A. Palmar grasp (4 mo) → Radial-palmar/raking (6 mo) → Radial digital (8 mo)
• B. Palmar grasp → Radial digital → Inferior pincer
• C. Dynamic tripod → Fine pincer → Radial palmar
• D. Palmar supinate → Digital pronate → Static tripod

Answer: (A)

The sequence tests how a baby’s grasp evolves from a whole-hand, palm-centered pattern to increasingly precise, finger-based control. Initially, the infant uses a palmar grasp, where objects are held in the palm with fingers reflexively curled. As hand control matures, a radial-palmar (also called raking) grasp emerges, with the thumb and the radial fingers helping to secure the object against the palm. Later still, the radial digital grasp appears, in which the object is held between the thumb and fingertips with less involvement of the palm. This progression—from palm-based to more distal fingertip control—fits the classic developmental trajectory.

The provided sequence reflects that exact order: starting with a palmar grasp, followed by radial-palmar/raking, and then radial digital. Other sequences either skip an intermediate stage or describe grasps that develop much later (such as the movements used for writing) or involve pronated/supinated patterns that are not typical in this early period.