A direct vernier has 100 VSD = 97 MSD and 1 MSD = 1 mm. Which statements are correct?

Select all that apply

• Option A

  Least count = 0.03 mm

• Option B

  The 40th vernier coincidence contributes 1.20 mm

• Option C

  If the observed reading is 12.20 mm and zero error is +0.09 mm, corrected reading is 12.11 mm

• Option D

  Its least count is smaller than that of a 50 VSD = 49 MSD vernier with the same MSD