In some plants, the ovary develops into fruit without fertilization.…

The correct answer is Option (4) → Parthenocarpy

Option (4) Parthenocarpy — Correct. In some species such as banana, the fruit develops without fertilisation. Such fruits are called parthenocarpic, and the phenomenon is parthenocarpy; it can be induced by growth hormones and the fruits are seedless.

NCERT Extract:
Seed – “… In most plants, by the time the fruit develops from the ovary, other floral parts degenerate and fall off. However, in a few species such as apple, strawberry, cashew, etc., the thalamus also contributes to fruit formation. Such fruits are called false fruits (Figure 1.15b). Most fruits however develop only from the ovary and are called true fruits. Although in most of the species, fruits are the results of fertilisation, there are a few species in which fruits develop without fertilisation. Such fruits are called parthenocarpic fruits. Banana is one such example. Parthenocarpy can be induced through the application of growth hormones and such fruits are seedless.”