Labels carrying the details of the parents, date of crossing etc., are tagged to the

Options

A. Male flowers of male parent
B. Female flowers of male parents
C. Emusculated flowers after crossing
D. Plants of pure line

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the labels that carry details such as the parents' information and the date of crossing. We need to identify to which part of the plant these labels are tagged.

2. **Identifying Key Terms**: The key terms in the question are "parents," "date of crossing," and "tagged." This suggests that the labels are related to a specific process in plant breeding.

3. **Understanding Hybridization Process**: In plant hybridization, there are two main methods: bagging and tagging. Bagging is used to prevent unwanted pollination, while tagging is used to record important information after the desired pollination has occurred.

4. **Bagging**: This involves covering the female part of the flower (the stigma) with a bag (like butter paper or polythene) to prevent any unwanted pollen from reaching it. This is done before the actual pollination.

5. **Tagging**: After the desired pollen has been dusted onto the emasculated flower, a tag is attached to the flower. This tag contains important information such as the details of the male and female parents, the date of emasculation, and the date of pollination.

6. **Identifying the Correct Option**: The question specifically asks where the labels are tagged. Since the labels contain information about the parents and the crossing date, they are tagged to the emasculated flower after the crossing has occurred.

7. **Conclusion**: Therefore, the correct answer is that the labels are tagged to the **emasculated flower after crossing**.

### Final Answer:
The labels carrying the details of the parents, date of crossing, etc., are tagged to the **emasculated flower after crossing**.

---