Fruit which develop only from the ovary are called :

True fruits

The correct answer is Option (3): True fruits

A true fruit is a fruit which develops from the mature and ripened ovary post fertilisation. The seeds of the fruit are developed from the ovule which is inside the ovary. The fruit which is developed from any other floral part of the flower along with ovary or without ovary is known as false fruit.

The false fruit can be developed from calyx, receptacle or thalamus. False fruit does not require fertilisation for its development. Most of the false fruit is developed from the receptacle which is a cup like enlargement which surrounds the ovary. For example, pear. In some plants like apples, false fruit develops from the thalamus.

Parthenocarpic fruits are fruits that develop without fertilization and, therefore, do not contain seeds. This process is known as parthenocarpy.

Apomixis is a form of asexual reproduction that mimics sexual reproduction, where seeds are formed without fertilization.