Which of the following points are important for successful bee-keeping?
(i) Knowledge of the nature and habits of bees.
(ii) Selection of suitable location for keeping the beehives.
(iii) Management of beehives different seasons.
(iv) Cross hybridisation among the selected parents.

Options

A. (i),(iii) and (iv)
B. (ii) and (iv)
C. (i), (ii) and (iii)
D. (i) and (iii)

Explanation

To determine the important points for successful beekeeping, let's analyze each option step by step:

1. **Knowledge of the nature and habits of bees**:
- Understanding the behavior, life cycle, and social structure of bees is crucial for effective beekeeping. This knowledge helps in managing the bees properly and ensuring their health and productivity.
- **Conclusion**: This point is important for successful beekeeping.

2. **Selection of suitable location for keeping the beehives**:
- The location of the beehives affects the bees' access to food sources (like flowers for nectar and pollen) and their protection from adverse weather conditions and predators. A good location can enhance the productivity of the hives.
- **Conclusion**: This point is also important for successful beekeeping.

3. **Management of beehives in different seasons**:
- Different seasons require different management practices. For instance, bees need more care during winter to ensure they have enough food and are kept warm. Understanding seasonal changes helps in maintaining hive health and productivity.
- **Conclusion**: This point is important for successful beekeeping.

4. **Cross hybridization among the selected parents**:
- While hybridization can be important in breeding programs to improve bee traits, it is not a direct management practice for beekeeping. It is more related to genetic improvement rather than the day-to-day management of beehives.
- **Conclusion**: This point is not directly related to successful beekeeping.

**Final Answer**: The important points for successful beekeeping are (i), (ii), and (iii).