Arrange the human life stages in chronological order. 1. Adulthood 2. Infancy 3. Childhood 4. Adolescence

Introduction / Context:
This is a direct age progression question from earliest to latest stage.

Given Data / Assumptions:
Infancy → Childhood → Adolescence → Adulthood.

Concept / Approach:
Order strictly by chronological development.

Step-by-Step Solution:
Infancy (2) earliest postnatal.Childhood (3) follows.Adolescence (4) puberty/teen.Adulthood (1) maturity.

Verification / Alternative check:
Standard developmental psychology references agree.

Why Other Options Are Wrong:
Any order placing adulthood before adolescence or childhood breaks timeline.

Common Pitfalls:
Confusing adolescence with childhood; adolescence is later.

Final Answer:
2, 3, 4, 1