Study the following statements and choose the correct option.
$I-$ Tapetum nourishes the developing pollen grains.
$II-$ Hilum represents the junction between ovule and funicle.
$III-$ In aquatic plants such as water hyacinth and water lily,pollination is by water.
$IV-$ The primary endosperm nucleus is triploid.

• A
  $I$ and $II$ are correct but $III$ and $IV$ are incorrect.
• B
  $I, II$ and $IV$ are correct but $III$ is incorrect.
• C
  $II, III$ and $IV$ are correct but $I$ is incorrect.
• D
  $I$ and $IV$ are correct but $II$ and $III$ are incorrect.