Which of the following is regarded as equivalent to perianth?

Cruciform corolla is found in

Among bitter gourd,mustard,brinjal,pumpkin,China rose,lupin,cucumber,sunn hemp,gram,guava,bean,chilli,plum,Petunia,tomato,rose,Withania,potato,onion,Aloe,and tulip,how many plants have hypogynous flowers?

The ovary is half-inferior in the flowers of . . . . . . .

Define the following term:
Aestivation

Axile placentation is an example of ........