Arrange SI prefixes by increasing magnitude: 1. Mega (10^6), 2. Kilo (10^3), 3. Tera (10^12), 4. Giga (10^9).

Introduction / Context:
SI prefix ordering checks understanding of powers of 10. You must place prefixes from the smallest factor to the largest.

Given Data / Assumptions:

• Kilo = 10^3 (2)
• Mega = 10^6 (1)
• Giga = 10^9 (4)
• Tera = 10^12 (3)

Concept / Approach:
Compare exponents: 3 < 6 < 9 < 12.

Step-by-Step Solution:

Verification / Alternative check:
Write example scales: 1 kB < 1 MB < 1 GB < 1 TB.

Why Other Options Are Wrong:
They disrupt the exponent order.

Common Pitfalls:
Mixing up mega and giga; misplacing kilo.

Final Answer:
2, 1, 4, 3