Select the option which describes the correct parts of the human brain with the functions mentioned below:
I. It contains association areas that are responsible for complex functions like intercessory associations, memory and communication.
II. It controls osmolarity of body fluids, urges for eating and drinking.
III. It is involved in the regulation of sexual behaviour , expression of emotional reactions.
IV. It controls cardio - vascular reflexes and gastric secretions.

Options

A. I-Cerebrum, II - Medulla, III - Limbic system, IV - Hypothalamus
B. I- Cerebellum , II - Hypothalamus, III - Cerebrum , IV - Medulla
C. I-Cerebral, II - Medulla, III - Hypothalamus, IV - Limbic system
D. I - Cerebral cortex, II- Hypothalamus, III- Hypothalamus and Limbic system, IV - Medulla

Answer

To solve the question, we need to identify the correct parts of the human brain associated with the functions mentioned. Let's analyze each statement step by step:

### Step 1: Analyze Statement I
**Statement:** It contains association areas that are responsible for complex functions like intercessory associations, memory, and communication.
**Analysis:** This statement refers to the **cerebral cortex**. The cerebral cortex is responsible for higher brain functions, including thought, memory, and communication.
**Conclusion:** This statement is correct for the **cerebral cortex**.

### Step 2: Analyze Statement II
**Statement:** It controls osmolarity of body fluids, urges for eating and drinking.
**Analysis:** This function is primarily associated with the **hypothalamus**. The hypothalamus plays a crucial role in regulating body temperature, hunger, thirst, and osmolarity of body fluids.
**Conclusion:** This statement is correct for the **hypothalamus**.

### Step 3: Analyze Statement III
**Statement:** It is involved in the regulation of sexual behavior, expression of emotional reactions.
**Analysis:** This function is also associated with the **hypothalamus** and the **limbic system**. The hypothalamus regulates sexual behavior and emotional responses, making it a key player in these functions.
**Conclusion:** This statement is correct for the **hypothalamus** and the **limbic system**.

### Step 4: Analyze Statement IV
**Statement:** It controls cardiovascular reflexes and gastric secretions.
**Analysis:** This function is primarily managed by the **medulla oblongata**. The medulla oblongata is responsible for autonomic functions such as heart rate, blood pressure, and digestive processes.
**Conclusion:** This statement is correct for the **medulla oblongata**.

### Final Conclusion
Based on the analysis of all four statements:
1. **Cerebral Cortex** - Association areas for complex functions.
2. **Hypothalamus** - Controls osmolarity, urges for eating and drinking.
3. **Hypothalamus/Limbic System** - Regulation of sexual behavior and emotional reactions.
4. **Medulla Oblongata** - Controls cardiovascular reflexes and gastric secretions.

Thus, the correct answer is the option that includes:
- Cerebral Cortex
- Hypothalamus
- Medulla Oblongata