Match each instrument specification in List I with the correct least count in List II.

List 1

1. 50 VSD = 48 MSD; 1 MSD = 0.5 mm

2. 100 VSD = 97 MSD; 1 MSD = 1 mm

3. Screw gauge: pitch = 0.4 mm, circular divisions = 80

4. 25 VSD = 24 MSD; 1 MSD = 1 mm

List 2

1. 0.005 mm

2. 0.020 mm

3. 0.030 mm

4. 0.040 mm