To determine which group of organisms has kidneys as their excretory organs, we will analyze each option provided in the question.
### Step-by-Step Solution:
1. **Understanding Excretory Organs**:
- Kidneys are specialized organs that filter blood and produce urine for excretion. They are found in various groups of organisms, particularly in vertebrates.
2. **Evaluating the First Option**:
- The first option includes **tunicates, lancelets, cyclostomes, chondrichthyes, ostichthyes, and amphibians**.
- **Tunicates**: They have a less developed excretory system and do not have kidneys.
- **Lancelets**: They possess a primitive excretory system called nephridia, not kidneys.
- **Cyclostomes, Chondrichthyes, Ostichthyes, and Amphibians**: These groups do have kidneys.
- Since tunicates and lancelets do not have kidneys, this option is **incorrect**.
3. **Evaluating the Second Option**:
- The second option includes **cyclostomes, chondrichthyes, ostichthyes, and amphibians**.
- All these groups possess kidneys as their excretory organs.
- Therefore, this option is **correct**.
4. **Evaluating the Third Option**:
- The third option includes **lancelets, cyclostomes, chondrichthyes, ostichthyes, and amphibians**.
- As established, lancelets do not have kidneys, making this option **incorrect**.
5. **Evaluating the Fourth Option**:
- The fourth option includes **tunicates, cyclostomes, chondrichthyes, ostichthyes, and amphibians**.
- Again, tunicates do not have kidneys, rendering this option **incorrect**.
### Conclusion:
The only option that includes organisms with kidneys as their excretory organs is the **second option**: **cyclostomes, chondrichthyes, ostichthyes, and amphibians**.
### Final Answer:
**B. Cyclostomes, Chondrichthyes, Ostichthyes, and Amphibians**
---
