Select the correct statements (s) regarding the structure of a mature embryo sac.
(i) Egg apparatus is situated towards chalzal end.
(ii) Antipodal cells are situated towards micropylar end.
(iii) A typical angiospermic embryo sac is 7-celled, 8-nucleate at maturity

Options

A. (i) only
B. (ii) only
C. (iii) only
D. (i),(ii) and (iii)

Explanation

To solve the question regarding the structure of a mature embryo sac, we need to evaluate each of the given statements one by one.

### Step-by-Step Solution:

1. **Evaluate Statement (i)**: "Egg apparatus is situated towards chalzal end."
- The egg apparatus, which consists of the egg cell and synergids, is located at the micropylar end of the embryo sac, not the chalzal end. Therefore, this statement is **incorrect**.

2. **Evaluate Statement (ii)**: "Antipodal cells are situated towards micropylar end."
- Antipodal cells are actually located at the chalzal end of the embryo sac, not the micropylar end. Hence, this statement is also **incorrect**.

3. **Evaluate Statement (iii)**: "A typical angiospermic embryo sac is 7-celled, 8-nucleate at maturity."
- A mature angiospermic embryo sac indeed consists of 7 cells and contains 8 nuclei (due to the fusion of two nuclei in the central cell). This statement is **correct**.

### Conclusion:
- The correct statement regarding the structure of a mature embryo sac is **(iii)** only.

### Final Answer:
- The correct option is **(iii)** only.

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