Read the following statements regarding porins and select the correct option given below:
$I$. Porins are transport proteins.
$II$. Channel proteins are a type of transport protein,which are usually gated.
$III$. Carrier protein binds the particular solute to be transported.
$IV$. Particular solute is delivered to the other side of the membrane by carrier proteins.

• A
  $I, II$ and $III$
• B
  $I, III$ and $IV$
• C
  $I, II, III$ and $IV$
• D
  $I$ and $IV$