Plzzz tell me this question plzzzzzz

Dear Student,
Given,
10 VSD = 9 MSD
Least count of the vernier callipers, 
$LC=\left(1-\frac{9}{10}\right)\times 1MSD=0.1\times 1mm=0.1 mm$
Vernier coincidence (VC) = 5
MSR = 0 mm
Thus,
zero error = $MSR+VC\times LC=0+5\times 0.1mm=0.5 mm$

Regards