A plant that has seeds but no flowers and fruits?

The correct  answer is Option (4) - Gymnosperms

The word “Gymnosperm” comes from the Greek words “gymnos”(naked) and “sperma”(seed), hence known as “Naked seeds.”

Gymnosperms are the seed-producing plants, but unlike angiosperms, they produce seeds without fruits.

Basically, gymnosperms are plants in which the ovules are not enclosed within the ovary wall, unlike the angiosperms.

It remains exposed before and after fertilisation and before developing into a seed.