Which of the following has a neurogenic heart?

Options

A. Cockroach
B. Octopus
C. Frog
D. Both(1)and(2)

Answer

To determine which organism has a neurogenic heart, let's analyze the options provided:

1. **Understanding Neurogenic Heart**:
- A neurogenic heart is one where the heartbeat is initiated and controlled by the nervous system. This is typical in lower invertebrates such as insects, crustaceans, and annelids.

2. **Analyzing the Options**:
- **Cockroach**: This is an insect and falls under the category of lower invertebrates. Therefore, it has a neurogenic heart.
- **Octopus**: This is a mollusk, which typically has a myogenic heart. Myogenic hearts are controlled by muscle tissue rather than nerves.
- **Frog**: As a vertebrate, frogs also possess a myogenic heart, which is similar to that of octopuses in that it is muscle-controlled.
- **Both 1 and 2**: This option suggests that both cockroach and octopus have neurogenic hearts, which is incorrect since the octopus has a myogenic heart.

3. **Conclusion**:
- Based on the analysis, the only organism from the options that has a neurogenic heart is the **cockroach**.

### Final Answer:
The organism that has a neurogenic heart is the **cockroach**.