Statement-$I$: Pollination by water is quite rare in flowering plants and is limited to about $30$ genera.
Statement-$II$: Hydrophytes pollen grains are protected from wetting by a mucilaginous covering.

• A
  Only statement $I$ is correct.
• B
  Only statement $II$ is correct.
• C
  Statement $I$ and $II$ both are correct.
• D
  Statement $I$ and $II$ both are incorrect.