In ovary we can find:
A. Primary follicle
B. Graafian follicle
C. Blood vessel
D. Corpus luteum

Options

A. A, B
B. A, B, C
C. C, D
D. A, B, C, D

Answer

To answer the question about what can be found in the ovary, we will analyze each option provided:

1. **Understanding the Ovary**: The ovary is a primary reproductive organ in females, responsible for producing gametes (eggs) and secreting hormones such as estrogen and progesterone.

2. **Analyzing Each Option**:
- **Option A: Primary Follicle**: Yes, primary follicles are present in the ovary. They are the earliest stage of follicle development.
- **Option B: Graafian Follicle**: Yes, Graafian follicles (also known as tertiary follicles) are present in the ovary. They are mature follicles that are ready for ovulation.
- **Option C: Blood Vessel**: Yes, blood vessels (arteries and veins) are present in the ovary, supplying it with necessary nutrients and hormones.
- **Option D: Corpus Luteum**: Yes, the corpus luteum is formed from the Graafian follicle after ovulation and is present in the ovary.

3. **Conclusion**: Since all four options (A, B, C, and D) are structures or components that can be found in the ovary, the correct answer is that all of them are present.

### Final Answer:
All of the above options (A. Primary follicle, B. Graafian follicle, C. Blood vessel, D. Corpus luteum) can be found in the ovary.