Which part of the fruit, labeled in the given figure makes it a false fruit?

Question

Question

Answer 1

Concept:

Fruit refers to a mature or ripened ovary, developed after fertilization.
The fruit consists of a wall or pericarp and seeds.
When the pericarp is thick and fleshy, it is differentiated into the outer epicarp, the middle mesocarp, and the inner endocarp.

Explanation:

Fruit is said to be false fruit when the fruit is formed from the other parts of the flower as well as the ovary like the receptacle (base), the perianth, thalamus, inflorescence, or calyx.
Examples of such fruits are strawberries, pineapple, mulberry, apples, pears, etc.
The given figure is of a false fruit.
False fruit develops from other floral parts and the thalamus along with the development of the ovary wall.
Therefore, the correct answer is option 4.

Additional Information If the fruit is formed without fertilization of the ovary, it is called a parthenocarpic fruit.