A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?

Options

• Option A

  A screw gauge having 100 divisions in the circular scale and pitch as 1 mm.

• Option B

  A screw gauge having 50 divisions in the circular scale and pitch as 1 mm.

• Option C

  A meter scale.

• Option D

  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.