The hind brain in a frog consists of

Options

A. (a) cerebellum
B. (b) medulla oblongata
C. (c) diencephalon
D. (d) Both (a) and (b)

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of the Frog's Brain**: The frog's brain is divided into three main sections: the forebrain, midbrain, and hindbrain. Each section has distinct components and functions.

2. **Identifying the Components of Each Brain Section**:
- **Forebrain**: This section includes the olfactory lobes, cerebral hemispheres, and diencephalon.
- **Midbrain**: The midbrain is characterized by the presence of optic lobes.
- **Hindbrain**: The hindbrain consists of two main parts: the cerebellum and the medulla oblongata.

3. **Analyzing the Options Given**:
- Option A: Cerebellum
- Option B: Medulla oblongata
- Option C: Diencephalon (which is part of the forebrain)
- Option D: Both A and B

4. **Determining the Correct Answer**: Since the hindbrain is made up of the cerebellum and medulla oblongata, the correct answer must include both these components. Therefore, the correct choice is option D (both A and B).

5. **Final Statement**: The hindbrain of a frog consists of the cerebellum and medulla oblongata.