Consider the following statements:
(i) Young's modulus is numerically equal to the stress which will double the length of a wire.
(ii) Viscosity of gases is greater than that of liquids.
(iii) The surface tension of a liquid decreases due to the presence of insoluble contamination.
The number of above statements that are true is

• A

  (i) only

• B

  (i) and (ii)

• C

  (ii)

• D

  (iii)