____ is/are glands that are present on the dorsal surface of thyroid gland.

Options

A. Thymus
B. Pituitary gland
C. Parathyroid glands
D. Adrenal gland

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the glands that are located on the dorsal surface of the thyroid gland.

2. **Identifying the Thyroid Gland's Location**: The thyroid gland is situated below the larynx (voice box) in the neck region.

3. **Evaluating the Options**:
- **Thymus**: Located at the back of the sternum, which is far from the thyroid gland.
- **Pituitary Gland**: Found at the base of the midbrain, below the hypothalamus, also distant from the thyroid gland.
- **Parathyroid Glands**: These are located on the dorsal surface (back) of the thyroid gland.
- **Adrenal Glands**: Positioned on top of each kidney, which is not related to the thyroid gland.

4. **Conclusion**: The only glands that are present on the dorsal surface of the thyroid gland are the **parathyroid glands**.

**Final Answer**: Parathyroid glands.

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