Chondrichtyes are

Options

A. ammonotelic
B. uricotelic
C. guanotelic
D. ureotelic

Answer

### Step-by-Step Solution:

1. **Understanding Chondrichthyes**:
- Chondrichthyes is a class of fish that includes sharks, rays, and skates. They are characterized by having a skeleton made of cartilage rather than bone.

2. **Identifying the Excretion Method**:
- Chondrichthyes are known for their method of excretion. They primarily excrete nitrogenous waste in the form of ammonia.

3. **Differentiating Excretion Types**:
- The options provided are:
- Ammonotelic: Excretes ammonia.
- Uricotelic: Excretes uric acid.
- Ureotelic: Excretes urea.
- Guanotelic: Excretes guanine.
- Since Chondrichthyes excrete ammonia, they fall under the category of ammonotelic organisms.

4. **Conclusion**:
- Therefore, the correct answer to the question "Chondrichthyes are" is **ammonotelic**.