Which of the following is not a chlorinated insecticide?

Options

A. DDT
B. Methoxychlor
C. Parathion
D. BHC

Answer

To determine which of the following is not a chlorinated insecticide, we will analyze each option provided:

### Step 1: Understand what a chlorinated insecticide is
Chlorinated insecticides are chemicals that contain chlorine atoms in their molecular structure and are used to kill insects.

### Step 2: Analyze the options
- **A. DDT (Dichlorodiphenyltrichloroethane)**:
- DDT contains chlorine atoms in its structure. Therefore, it is a chlorinated insecticide.

- **B. Methoxychlor**:
- Methoxychlor also contains chlorine in its structure. Thus, it is classified as a chlorinated insecticide.

- **C. Parathion**:
- Parathion does not contain chlorine in its structure. Instead, it is a phosphate insecticide, which means it is not chlorinated.

- **D. BHC (Benzene Hexachloride)**:
- BHC has multiple chlorine atoms in its structure, making it a chlorinated insecticide.

### Step 3: Conclusion
After analyzing all the options, we find that the only option that is not a chlorinated insecticide is **C. Parathion**.

### Final Answer:
**C. Parathion**

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