During menstrual cycle there is morphological and physiological change in :
A. Uterus
B. Ovary
C. Penis
D. Labia majora

Options

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

Answer

To answer the question regarding the morphological and physiological changes during the menstrual cycle, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Menstrual Cycle**:
- The menstrual cycle is a monthly series of changes that a woman's body goes through in preparation for the possibility of pregnancy. It typically lasts about 28 days.

2. **Identifying the Key Organs**:
- The primary organs involved in the menstrual cycle are the uterus and the ovaries. The uterus is where a fertilized egg would implant and develop, while the ovaries produce eggs and hormones.

3. **Analyzing Each Option**:
- **Option A: Uterus**:
- During the menstrual cycle, the endometrium (the inner lining of the uterus) undergoes significant changes. It thickens in preparation for a potential pregnancy and breaks down during menstruation if fertilization does not occur. This indicates both morphological (structural) and physiological (functional) changes.
- **Option B: Ovary**:
- The ovaries also experience changes during the menstrual cycle. They release hormones such as estrogen and progesterone and undergo changes related to the maturation and release of eggs (ovulation). This also indicates both morphological and physiological changes.
- **Option C: Penis**:
- The penis is part of the male reproductive system and does not undergo changes during the menstrual cycle, which is specific to females.
- **Option D: Labia Majora**:
- The labia majora are part of the external female genitalia. They do not undergo significant morphological or physiological changes during the menstrual cycle.

4. **Conclusion**:
- Based on the analysis, the organs that undergo morphological and physiological changes during the menstrual cycle are the uterus (Option A) and the ovaries (Option B). Therefore, the correct answer is both A and B.

### Final Answer:
**A. Uterus and B. Ovary** undergo morphological and physiological changes during the menstrual cycle.