The correct option is
C Cucurbitaceae
Pepo is a succulent fruit that develops from an inferior unilocular ovary with parietal placentation. It is commonly found in Cucurbitaceae.
The fruit of Cruciferae is siliqua.
The fruit of Leguminosae is legume or pod.
The fruit of Liliaceae is capsule or rarely berry.
So, the correct answer is 'Cucurbitaceae'.