For delicate or precision work, the work surface height should be:

Correct option is B

For delicate or precision work (such as hand sewing, fine electronics assembly, embroidery, or drawing), the work surface should be slightly elevated — about 2 to 3 inches above the elbow height of the seated or standing person. This helps reduce eye strain and supports better hand control without slouching or excessive arm lifting.
Information Booster:
· Elevating the work surface for fine tasks brings the object closer to the eyes and allows better visibility and precision.
· It also minimizes fatigue in the shoulders and neck, as the arms remain supported and closer to a natural posture.
· Examples of such work include jewelry making, needlework, circuit board inspection, and detailed handcrafting.
Additional Knowledge:
· (a) At elbow height: This is ideal for light work or general-purpose tasks, like writing or typing, but not best for precision tasks where close visibility and control are crucial.
· (c) 2–3 inches below elbow height: This is suitable for heavy or forceful tasks, such as kneading dough or carpentry, where body weight may be used for better leverage.
· (d) Any desired height: This option is incorrect because ergonomic design is based on human body mechanics, and inappropriate work surface height can cause fatigue, discomfort, or injury over time.