Read the following statements :
A. The cerebral aqueduct passes through the cerebrum.
B. The cones are responsible for photopic vision, while the rods allow scotopic vision.
C. The ampulla is found in the base of the semi-circular canals and its special receptors help in hearing.
How many of the given statements are correct ?

Options

A. None
B. One
C. Two
D. Three

Answer

To determine how many of the given statements are correct, let's analyze each statement one by one.

### Step 1: Analyze Statement A
**Statement A:** "The cerebral aqueduct passes through the cerebrum."
- The cerebral aqueduct is a narrow channel that connects the third ventricle to the fourth ventricle in the brain. It is located in the midbrain, not the cerebrum.
- **Conclusion:** This statement is **incorrect**.

### Step 2: Analyze Statement B
**Statement B:** "The cones are responsible for photopic vision, while the rods allow scotopic vision."
- Cones are photoreceptor cells in the retina that function best in bright light conditions and are responsible for color vision (photopic vision). Rods, on the other hand, are more sensitive to light and allow us to see in low-light conditions (scotopic vision).
- **Conclusion:** This statement is **correct**.

### Step 3: Analyze Statement C
**Statement C:** "The ampulla is found in the base of the semi-circular canals and its special receptors help in hearing."
- The ampulla is indeed located at the base of each semicircular canal in the inner ear, but it is primarily involved in the sense of balance and spatial orientation, not in hearing. The structures responsible for hearing are the cochlea and the hair cells within it.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion
- Out of the three statements, only **one statement (Statement B)** is correct.

### Answer
Thus, the number of correct statements is **1**.

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