Datura belongs to which family?

Which of the following characters are related to the Asteraceae family?
$(a)$ Inflorescence racemose head or capitulum
$(b)$ Fruit with hairy pappus
$(c)$ Placentation marginal
$(d)$ Ovary superior

Gynobasic style is found in

What is the systematic position of the family $Cucurbitaceae$ according to the Bentham and Hooker system of classification?

To which family does the genus $Gossypium$ belong?

The floral formula of Caesalpinoideae is: