JEE Mains Model Paper 8

The pitch of a screw gauge is 0.5 mm and there are 50 divisions on circular scale when there isnothing between two ends of screw gauge 45th division of circular scale is coinciding with screw gaugeand in this situation zero of main scale is not visible. When wire is placed between the two ends, thelinear scale reads 2 divisions and 20th division of circular scale coincides with reference line. For thissituation mark the correct statement