Fruit of custard apple is

Options

A. Etaerio of berries
B. Etaerio of drupes
C. Hypanthodium
D. Etaerio of achenes

Answer

### Step-by-Step Solution:

1. **Identify the Scientific Name**: The scientific name of custard apple is *Annona squamosa*.

2. **Understand the Structure of the Fruit**: The edible part of the custard apple is the pericarp, which is the inner layer of the fruit.

3. **Classify the Type of Fruit**: The custard apple is classified as an aggregate fruit. Aggregate fruits are formed from a single flower that has multiple ovaries.

4. **Differentiate Between Ovaries**: Aggregate fruits can be formed from either a polycarpillary ovary (where multiple carpels are fused) or an apocarpous ovary (where the carpels are not fused). In the case of custard apple, it is formed from an apocarpous ovary.

5. **Formation of Aggregate Fruit**: Each carpel in the apocarpous ovary develops into a small fruitlet. These fruitlets combine to form the aggregate fruit.

6. **Identify the Type of Aggregate Fruit**: The custard apple is specifically classified as an "etario of berries," which means it is a group of small berries that develop on the fleshy thalamus.

7. **Conclusion**: Therefore, the fruit of the custard apple can be correctly identified as an "etario of berries."

### Final Answer:
The fruit of custard apple is an **etario of berries**.

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