The structures derived from extoderm are
(i). Pituitary gland
(ii). Comea
(iii). Kidneys
(iv). Notochord

Options

A. (i) and (iii)
B. (ii) and (iii)
C. (i) and (ii)
D. (ii) and (iv)

Explanation

To determine which structures are derived from the ectoderm, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand Ectoderm**:
- The ectoderm is the outermost germ layer formed during the early stages of embryonic development (gastrulation). It gives rise to various structures in the body.

2. **Analyze Each Option**:
- **(i) Pituitary gland**:
- The pituitary gland is indeed derived from the ectoderm. It develops from a structure called Rathke's pouch, which originates from the ectoderm.
- **(ii) Cornea**:
- The cornea, which is part of the eye, is also derived from the ectoderm. It forms from the surface ectoderm and mesoderm.
- **(iii) Kidneys**:
- The kidneys are not derived from the ectoderm; they are derived from the mesoderm. Specifically, they develop from the intermediate mesoderm.
- **(iv) Notochord**:
- The notochord is also not derived from the ectoderm; it is derived from the mesoderm. It serves as a primitive backbone in the early embryo.

3. **Conclusion**:
- From the analysis, we find that the structures derived from the ectoderm are:
- (i) Pituitary gland
- (ii) Cornea
- Therefore, the correct answer is that the structures derived from the ectoderm are options (i) and (ii).

### Final Answer:
The structures derived from the ectoderm are:
- (i) Pituitary gland
- (ii) Cornea