Which pencil is most suitable for making very light preliminary lines in a drawing?

Correct answer: 4H

Pencil grading is the governing concept: H grades have harder graphite and make lighter, cleaner marks, while B grades are softer and darker. A 4H pencil therefore suits preliminary construction lines because the artist can establish proportions and placement without creating heavy marks that are difficult to remove. Option C is correct. The 4B, 2B, and 6B choices are progressively softer and are more useful for darker shading.