Understanding Reflex Development Course Matching

This question requires matching primitive reflexes found in infants with the typical timeframe for their disappearance, which indicates developmental progression. Primitive reflexes are automatic responses to stimuli that are present at birth and usually disappear as the central nervous system matures.

Matching Reflexes to Developmental Course

We need to pair each reflex in List I (Reflex) with its corresponding developmental course from List II (Development Course). The correct pairings are based on established developmental timelines for infant reflexes.

Detailed Breakdown of Matches:

• (a) Rooting reflex is matched with (i) Disappears between 3 to 6 months.

  The rooting reflex helps an infant find the nipple for feeding. When the corner of the baby's mouth or cheek is stroked, the baby turns their head towards the stimulus and opens their mouth. This reflex typically fades between 3 to 6 months of age.

• (b) Moro reflex is matched with (iii) Disappears in 3 to 4 months.

  The Moro reflex, also known as the startle reflex, occurs when a baby is startled by a loud noise or sudden movement. The baby will throw back their head, extend their arms and legs, cry, and then bring their arms back toward the body. According to this question's provided options, this reflex disappears between 3 to 4 months.

• (c) Grasp reflex is matched with (ii) Disappears in 6 to 7 months.

  The grasp reflex is elicited by placing a finger or object in an infant's palm. The baby will close their fingers around the object. This reflex typically lasts until about 6 to 7 months of age.

• (d) Babinski reflex is matched with (iv) Disappears in 8 to 12 months.

  The Babinski reflex occurs when the sole of an infant's foot is stroked from heel to toe. The infant's big toe will then point upward or toward the shin, and the other toes will fan out. This reflex usually disappears around 8 to 12 months of age, replaced by the adult plantar reflex (toes curling downward).

Summary of Correct Matching

Based on the analysis and the provided correct answer, the complete matching is:

• Rooting (a) - Disappears between 3 to 6 months (i)
• Moro (b) - Disappears in 3 to 4 months (iii)
• Grasp (c) - Disappears in 6 to 7 months (ii)
• Babinski (d) - Disappears in 8 to 12 months (iv)

Therefore, the correct option representing this match is (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv).