Tentacles of ctenophores contain

Options

A. Cnidoblasts
B. Colloblasts
C. Comb plates
D. Statocysts

Explanation

### Step-by-Step Solution:

1. **Understanding Ctenophores**:
- Ctenophores, also known as comb jellies, belong to the phylum Ctenophora within the kingdom Animalia. They are marine invertebrates characterized by their gelatinous bodies and distinctive comb-like cilia.

2. **Identifying Tentacles**:
- Ctenophores have tentacles that serve a crucial role in their feeding mechanism. These tentacles are used primarily to capture prey.

3. **Specialized Cells in Tentacles**:
- The tentacles of ctenophores contain specialized cells that aid in the capture of prey. These cells are known as coloblasts.

4. **Understanding Coloblasts**:
- Coloblasts are unique to ctenophores and are responsible for the adhesive properties of the tentacles. They help in trapping small organisms, which are then brought to the mouth for consumption.

5. **Eliminating Other Options**:
- The other options provided (neuroblast, complates, and thatosis) do not relate to the structure or function of ctenophore tentacles. Neuroblasts are related to nerve cells, while the other terms do not correspond to any known structures in ctenophores.

6. **Final Answer**:
- Therefore, the correct answer to the question "Tentacles of ctenophores contain" is **coloblasts**.

### Final Answer:
The tentacles of ctenophores contain **coloblasts** (Option 2).