Which of the following statements are true or false?
$I.$ The positive hydrostatic pressure is called turgor pressure.
$II.$ Wall pressure is exerted to prevent the increase of protoplasm size.
$III.$ Diffusion is more rapid in liquids than in gases.
$IV.$ Diffusion of water through a semi-permeable membrane is called imbibition.
$V.$ Osmosis is the movement of a substance,which takes place along a diffusion gradient.

• A
  $I$ and $II$ are true,while $III, IV$ and $V$ are false.
• B
  $I$ and $III$ are true,while $II, IV$ and $V$ are false.
• C
  $I$ and $IV$ are true,while $II, III$ and $V$ are false.
• D
  $I$ and $II$ are true,while $III, IV$ and $V$ are false.