Which one of the following events is correctly matched with the time period in a normal menstrual cycle?

Options

A. Release of egg 5th day
B. Endometrium regenerates 5-10 days
C. Endometrium secretes nutrients for implantation 11-18 days
D. Rise in progesterone level 1-15 days

Explanation

To solve the question regarding which event is correctly matched with the time period in a normal menstrual cycle, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding the Menstrual Cycle**:
- The normal menstrual cycle is approximately 28 days long and consists of several phases: menstrual phase, proliferative phase, ovulation, and secretory phase.

2. **Option 1: Release of egg on the 5th day**:
- This statement is incorrect. Ovulation, which is the release of an egg, typically occurs around the 14th day of the cycle, not the 5th day.

3. **Option 2: Endometrium regenerates from 5 to 10 days**:
- This statement is correct. After menstruation, during the proliferative phase, the endometrium (the lining of the uterus) regenerates and thickens from approximately the 5th to the 10th day of the cycle.

4. **Option 3: Endometrium secretes nutrients for implantation from 11 to 8 days**:
- This statement is incorrect. The endometrium does not secrete nutrients for implantation during this time. Instead, it prepares for potential implantation after ovulation, which occurs around day 14.

5. **Option 4: Rise in progesterone level takes place from 1 to 15 days**:
- This statement is also incorrect. The rise in progesterone occurs during the secretory phase, which starts after ovulation, around day 16, due to the secretion from the corpus luteum.

6. **Conclusion**:
- The only correct statement is Option 2: "Endometrium regenerates from 5 to 10 days."

### Final Answer:
The correct answer is **Option 2: Endometrium regenerates from 5 to 10 days.**