Up to which accuracy small gap gauges can be measured by using slip gauges?

• A. ¬¨¬®¬¨¬± 0.001 mm
• B. ¬¨¬®¬¨¬± 0.002 mm
• C. ¬¨¬®¬¨¬± 0.003 mm
• D. ¬¨¬®¬¨¬± 0.004 mm