I. Metallic electrodes are dipped into electrolyte.
II. Half-cells are connected by metallic wire through voltmeter and switch.
III.There is no need of salt bridge if the electrodes are dip in the same electrolyte.

Which of the following statements is/are true for the above diagram? Choose the correct option.

• A

  I and II

• B

  lI and III

• C

  III and I

• D

  I, II and III