The least count of a vernier callipers P and Q, 1 MSD = 1 mm. For P, 10 VSD + 8 MSD and for Q, 20 VSD = 15 MSD. The vernier callipers that gives more accurate reading is _______________.

Options

A. 0..1 mm
B. 0.01 cm
C. 0.1 cm
D. 0.001 mm

Answer

B

Explanation

10 VSD = 9 mm
1 VSD = 0.9 mm
1 MSD = 1 mm
Least count = 1 MSD - 1 VSD
= 1 mm - 0.9 mm = 0.1 mm = 0.01 cm