Comparing charge magnitudes using SI prefixes Steps:

• Identify prefixes: k (kilo) = 10³, μ (micro) = 10⁻⁶, n (nano) = 10⁻⁹.
• Convert values: 1 kC = 1 × 10³ C = 1000 C; 1 μC = 1 × 10⁻⁶ C; 1 nC = 1 × 10⁻⁹ C.
• Compare numerically: 1000 C > 0.000001 C > 0.000000001 C.
• Order from largest to smallest: 1 kC > 1 μC > 1 nC (option D).

Why D is correct:

• It follows the standard SI prefix scaling, where kilo is 10⁹ times larger than micro and 10¹² times larger than nano.

Why the others are wrong:

• A: Incorrectly ranks μC above kC, ignoring k = 10⁹ × μ.
• B: Wrongly places nC largest, but nC is smallest (10⁻³ × μC).
• C: Reverses μC and kC, as kC = 10⁹ μC.

Final answer: D