The saturated heterocyclic compound is:

Options

A.
B.
C.
D.

Explanation

To determine which of the given compounds is a saturated heterocyclic compound, we need to follow these steps:

### Step 1: Understand the Definitions
- **Saturated Compound**: A compound that contains only single bonds between carbon atoms and does not have any double or triple bonds.
- **Heterocyclic Compound**: A cyclic compound that contains at least one atom in the ring that is not carbon (e.g., nitrogen, oxygen, sulfur).

### Step 2: Analyze the Options
Assuming we have several options labeled A, B, C, and D, we need to analyze each one to check if it meets the criteria of being saturated and heterocyclic.

### Step 3: Check for Saturation
For each option:
- Look for the presence of double or triple bonds. If any are present, that compound is not saturated.
- Ensure all carbon-carbon bonds are single bonds.

### Step 4: Check for Heteroatoms
For each option:
- Identify if there is at least one atom in the ring that is not carbon. Common heteroatoms include nitrogen (N), oxygen (O), and sulfur (S).

### Step 5: Identify the Correct Compound
After analyzing all options, the compound that has:
- No double or triple bonds (saturated)
- At least one heteroatom in the ring (heterocyclic)

is the correct answer.

### Conclusion
Based on the analysis, the saturated heterocyclic compound is option C, which contains nitrogen in the ring and has no double bonds.

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