White spongy floating roots occur in

$A$ plant called 'plantless root' is:

Plants that produce characteristic respiratory roots $(pneumatophores)$ and are viviparous are known as:

Read the following statements with respect to the functions of the roots and select the incorrect option.

Why is $velamen$ not a hypodermal tissue? Because...

$I$. Root hairs are unicellular.
$II$. Trichomes are multicellular usually.
Identify the correct statement and select the correct option.