Arrange the human developmental stages in biological order. a) Neonate (newborn) b) Child c) Infant d) Embryo

Introduction / Context:
The question orders early human life stages. In biology, development proceeds from prenatal to postnatal phases with well-defined terms.

Given Data / Assumptions:

• Embryo: prenatal stage before birth.
• Neonate: newborn, roughly the first month after birth.
• Infant: post-neonatal infancy through the first year(s).
• Child: later childhood after infancy.

Concept / Approach:
Strict chronological order: Embryo -> Neonate -> Infant -> Child.

Step-by-Step Solution:
Step 1: Embryo (d) exists before birth.Step 2: Neonate (a) is immediately after birth.Step 3: Infant (c) follows the neonatal period.Step 4: Child (b) follows infancy.

Verification / Alternative check:
Pediatric terminology across standard texts supports this order.

Why Other Options Are Wrong:
Any order that places embryo after birth, or child before infant, contradicts biological chronology.

Common Pitfalls:
Confusing neonate and infant; neonate is a specific sub-stage of infancy focused on the first month post-birth.

Final Answer:
d, a, c, b