Adrenal gland is derived from

Options

A. Ectoderm
B. Mesoderm
C. Endoderm
D. Both (1) and (3)

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about the embryonic origin of the adrenal gland. It is important to know which of the three germ layers (ectoderm, mesoderm, or endoderm) gives rise to this gland.

2. **Identifying the Germ Layers**: The three primary germ layers in embryonic development are:
- Ectoderm: This layer forms structures such as skin, hair, nails, and the nervous system.
- Mesoderm: This layer forms muscles, bones, the circulatory system, and other internal organs.
- Endoderm: This layer forms the lining of the digestive tract and respiratory system, as well as some glands.

3. **Specific Origin of the Adrenal Gland**: The adrenal gland is specifically derived from neural crest cells, which originate from the ectoderm. This is a crucial point because it indicates that the adrenal gland has its embryonic roots in the ectoderm.

4. **Evaluating the Options**: The options provided are:
- A. Ectoderm
- B. Mesoderm
- C. Endoderm
- D. Both 1 and 3 (which implies ectoderm and endoderm)

Since we established that the adrenal gland is derived from the ectoderm, we can eliminate options B, C, and D.

5. **Conclusion**: The correct answer is option A, which is ectoderm.

### Final Answer
The adrenal gland is derived from the ectoderm.