Which one of the following is the largest part of brain

Options

A. cerebrum
B. olfactory lobe
C. cerebellum
D. medulla oblongata

Answer

**Step-by-Step Solution:**

1. **Understanding the Brain Structure**: The human brain is divided into three main parts: the forebrain, midbrain, and hindbrain. Each of these parts has specific functions and structures.

2. **Identifying the Forebrain**: The forebrain includes the cerebrum, thalamus, and hypothalamus. Among these, the cerebrum is the most significant part.

3. **Recognizing the Function of the Cerebrum**: The cerebrum is responsible for higher brain functions, including thought, action, and sensory processing. It plays a crucial role in voluntary movements and cognitive functions.

4. **Comparing Other Brain Parts**: The other options provided in the question are the olfactory lobe, cerebellum, and medulla oblongata.
- The olfactory lobe is involved in the sense of smell.
- The cerebellum is responsible for coordination and balance.
- The medulla oblongata controls involuntary functions such as breathing and heart rate.

5. **Conclusion**: Among the options given (cerebrum, olfactory lobe, cerebellum, and medulla oblongata), the cerebrum is the largest part of the brain.

**Final Answer**: The largest part of the brain is the **cerebrum**.

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