The seeds which have separate endosperm:
1. Maize 2. Onion 3. Rice 4. Bean
Code :

Options

A. 1, 2 and 3 are correct
B. 1 and 2 are correct
C. 2 and 4 are correct
D. 1 and 3 are correct

Answer

To determine which seeds have a separate endosperm, we can analyze each option provided in the question:

1. **Maize**: Maize is known to have a separate endosperm. The endosperm persists after maturation and provides nutrition to the developing embryo.

2. **Onion**: Onion seeds also have a separate endosperm. Similar to maize, the endosperm remains after maturation and serves as a nutrient source for the embryo.

3. **Rice**: Rice seeds are classified as endospermic seeds, meaning they also have a separate endosperm that provides nourishment to the embryo during its development.

4. **Bean**: Beans are classified as non-endospermic seeds. In beans, the endosperm is absorbed during maturation, so there is no separate endosperm present at maturity.

Based on this analysis, the seeds that have a separate endosperm are:

- Maize
- Onion
- Rice

Thus, the correct code for the seeds with separate endosperm is **1, 2, 3** (Maize, Onion, Rice).