$I.$ Annual rigs are formed as a result of seasonal environmental conditions

$II.$ Tracheids/vessels elements are larger during periods when water is abundant

$III.$ Tracheids/vessels elements have thicker wall during periods of water deprivation

$IV.$ Wood formed in the previous years is darker than newer wood

Select the combination of correct statements from the options given below

• A

  $I$ and $II$

• B

  $II$ and $IV$

• C

  $I$, $II$ and $III$

• D

  $II$, $III$ and $IV$