The insecticide gammexane is a formulation for

Options

A. DDT
B. benzenehexachloride
C. hexachlorobenzene
D. chloral

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the formulation of the insecticide gammexane. We need to identify which chemical compound it corresponds to from the given options.

2. **Identifying Gammexane:**
Gammexane is also known as Lindane, which is a well-known insecticide. It is important to recognize that gammexane is a specific isomer of hexachlorocyclohexane.

3. **Analyzing the Options:**
The options provided are:
- DDT
- Benzene hexachloride
- Hexachlorobenzene
- Chlorine

4. **Understanding Benzene Hexachloride:**
Benzene hexachloride (BHC) is a term that can refer to a mixture of isomers of hexachlorocyclohexane, one of which is gammexane (Lindane). Gammexane specifically refers to the gamma isomer of hexachlorocyclohexane.

5. **Conclusion:**
Since gammexane is a formulation of hexachlorocyclohexane and is often referred to as benzene hexachloride, the correct answer to the question is:
- **Benzene hexachloride.**

**Final Answer: Benzene hexachloride.**

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