Step 1: Understanding Pencil Grades.
Pencils are graded by their hardness. Pencils with a "B" grade are softer and produce darker lines, while those with an "H" grade are harder and produce lighter lines. The higher the number in the "B" series, the softer the pencil and the darker the line.
Step 2: Verifying the Options.
- Option (1): HB pencils produce medium
-dark lines, but they are not the darkest.
- Option (2): H pencils are hard and produce light lines.
- Option (3): 2B pencils are softer and produce dark lines.
- Option (4): 2H pencils are hard and produce light lines.
Conclusion:
Therefore, the correct answer is (3) 2B.