( A ) A vernier calliper where the 10 divisions in vernier scale matches with 9 division in main scale and main scale has 10 divisions in 1 cm.
( B ) A meter scale.
( C ) A screw gauge having 100 divisions in the circular scale and pitch as 1 mm.
( D ) A screw gauge having 50 divisions in the circular scale and pitch as 1 mm.
