Number of rod cells in eye is

Options

A. 120 million
B. 80 million
C. 60 million
D. 180 million

Answer

**Step-by-Step Solution:**

1. **Understanding Rod Cells**: Rod cells are a type of photoreceptor found in the retina of the eye. They are responsible for vision in low light conditions, known as scotopic vision.

2. **Location of Rod Cells**: These cells are primarily located at the outer edges of the retina, which allows for peripheral vision in dim lighting.

3. **Counting Rod Cells**: The human eye contains approximately 120 million rod cells. This is a well-established fact in the study of human anatomy and physiology.

4. **Analyzing the Options**: The question provides four options:
- A) 120 million
- B) 80 million
- C) 60 million
- D) 180 million

5. **Identifying the Correct Answer**: Based on the information about the number of rod cells, the only correct option is A) 120 million.

6. **Conclusion**: Therefore, the number of rod cells in the eye is 120 million.

**Final Answer**: A) 120 million

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