Correct option is C
Newborns exhibit primitive reflexes, which gradually disappear as the nervous system matures. The correct sequence of reflex disappearance is:
1. Rooting reflex (C) – Disappears by 4 months:
· When the baby’s cheek is stroked, they turn towards the stimulus and open their mouth (important for breastfeeding).
· Typically disappears by 4 months as voluntary sucking develops.
2. Stepping reflex (A) – Disappears by 2 months:
· When held upright with feet touching a surface, the baby makes stepping motions.
· Fades by 2 months as leg control develops.
3. Palmar grasp reflex (E) – Disappears by 5–6 months:
· When an object touches the baby's palm, they grip it tightly.
· Weakens around 5–6 months, as voluntary grasping emerges.
4. Moro reflex (B) – Disappears by 6 months:
· Also called the startle reflex, where the baby throws out their arms and then retracts them when startled.
· Usually disappears by 6 months as the nervous system matures.
5. Babinski reflex (D) – Disappears by 12–24 months:
· When the sole of the foot is stroked, the toes fan out.
· Typically disappears by 12–24 months as corticospinal tract myelination progresses.
Information Booster:
· Reflexes disappear as voluntary motor control improves.
· Persistent reflexes beyond their expected timeframe may indicate neurological disorders.