Sucking roots occur in
Ficus
Vanda
Carrot
Mistletoe
Seeds of the orchids are
The condition where filaments and anthers are fused throughout entire length is
$A$. Citrus and Ricinus have synandrous condition.
$B$. In epitepalous condition, the cohesion occurs bewteen tepal and filament of stamen.
$C$. Tetradynamous condition consists of two long and four short stamen filaments.
Presence of leaves of more than one shape is common in amphibious plants $(Helophytes)$ like Limnophila. This is called