Ora serrata is

Options

A. Centre point of macula lutea
B. Area devoid of receptor cells
C. Area between sensory and non-sensory part of retina
D. Part of choroid adjacent to retina possessing light reflecting guanine crystals

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Ora Serrata":**
- The term "Ora Serrata" refers to a specific anatomical feature in the eye. It is important to recognize that it is a part of the eye's structure.

2. **Identifying the Location:**
- The Ora Serrata is located at the junction between the retina and the ciliary body. This is a critical point as it marks the transition between two different types of tissues in the eye.

3. **Defining the Function:**
- The Ora Serrata serves as a boundary that separates the sensory part of the retina (which is photosensitive and responsible for vision) from the non-sensory part (the ciliary body, which is not involved in light detection).

4. **Clarifying the Options:**
- Now, we can evaluate the options provided in the question:
- **Center point of macula lutea**: This is incorrect; the macula lutea is a different area of the retina.
- **Area devoid of receptor cells**: This is also incorrect; the Ora Serrata does not refer to an area without receptor cells.
- **Area between sensory and non-sensory part of retina**: This is correct, as it is indeed the junction between these two parts.
- **Part of choroid adjacent to retina possessing light reflecting guanine crystals**: This is incorrect; it describes a different structure in the eye.

5. **Conclusion:**
- Based on the analysis, the correct answer to the question "Ora serrata is" is "area between sensory and non-sensory part of retina."

---