Read the following statements carefully :
(i) Urge for eating and drinking as well as body temperature is controlled by the hypothalamus.
(ii) The limbic system along involved in the regulation of sexual behavior, expression of emotions , and excitement.
(iii) The presence of four round swellings called corpora quadrigemina on the ventral portion of the midbrain is the characteristics feature of the human brain.
(iv) Cerebellum has a very convoluted surface in order to provide additional space for many neurons.
How many statements from the above is/are correct ?

Options

A. Four
B. One
C. Two
D. Three

Answer

To determine how many statements are correct, let's analyze each statement step by step:

### Step 1: Analyze Statement (i)
**Statement (i):** "Urge for eating and drinking as well as body temperature is controlled by the hypothalamus."

- The hypothalamus is indeed responsible for regulating hunger, thirst, and body temperature. It plays a crucial role in maintaining homeostasis in the body.

**Conclusion:** This statement is **correct**.

### Step 2: Analyze Statement (ii)
**Statement (ii):** "The limbic system is involved in the regulation of sexual behavior, expression of emotions, and excitement."

- The limbic system does play a role in regulating emotions and sexual behavior. However, the statement implies that the limbic system alone is responsible for these functions without mentioning the hypothalamus, which also plays a significant role.

**Conclusion:** This statement is **incorrect** because it does not acknowledge the role of the hypothalamus alongside the limbic system.

### Step 3: Analyze Statement (iii)
**Statement (iii):** "The presence of four round swellings called corpora quadrigemina on the ventral portion of the midbrain is the characteristic feature of the human brain."

- The corpora quadrigemina consists of four swellings located on the dorsal part of the midbrain, not the ventral part. Therefore, while the presence of corpora quadrigemina is correct, the location mentioned is incorrect.

**Conclusion:** This statement is **incorrect**.

### Step 4: Analyze Statement (iv)
**Statement (iv):** "Cerebellum has a very convoluted surface in order to provide additional space for many neurons."

- The cerebellum does have a highly convoluted surface, which increases its surface area and allows for a greater number of neurons to be accommodated.

**Conclusion:** This statement is **correct**.

### Final Conclusion
After analyzing all four statements:
- Correct Statements: (i) and (iv)
- Incorrect Statements: (ii) and (iii)

Thus, the total number of correct statements is **2**.

### Answer: 2 statements are correct.

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