Which of the following is a geocarpic fruit?

In which of the following fruits,the edible part is the aril?

$A$ fruit that develops from a single flower with a syncarpous pistil is

The juicy hair-like structures found in lemon fruits develop from the .......... .

Pepo fruit is found in

How many of the following plants produce composite fruits (multiple fruits) derived from a single inflorescence? Plants: Walnut,Poppy,Fig,Radish,Pineapple,Apple,Tomato,Mulberry.