Which among the following are herbicides?
(i) Malathion
(ii) Metolachlor
(iii) Simazine
(iv) MCPA
(v) Disyston
(vi) Gammexane
(vii) Butachlor
(viii) 2, 4-D
(ix) Dalapon
(x) BHC

Options

A. (ii), (iii), (iv), (vii), (viii) and (ix) only
B. (i), (ii), (iii), (iv) and (ix) only
C. (iv), (vi), (vii), (viii) and (x) only
D. (i), (iii), (v), (vi) and (x) only

Explanation

To determine which among the given options are herbicides, we will analyze each substance listed in the question. Herbicides are chemicals specifically designed to kill or inhibit the growth of unwanted plants or weeds.

**Step 1: Identify each substance and its use.**

1. **Malathion** - This is an insecticide used to control insects, not a herbicide.
2. **Metolachlor** - This is a herbicide used to control weeds in crops.
3. **Simazine** - This is also a herbicide used for weed control.
4. **MCPA** - This is a herbicide used to control broadleaf weeds.
5. **Disyston** - This is an insecticide, not a herbicide.
6. **Gammexane** - This is an insecticide, not a herbicide.
7. **Butachlor** - This is a herbicide used for weed control in rice and other crops.
8. **2, 4-D** - This is a well-known herbicide used to control broadleaf weeds.
9. **Dalapon** - This is a herbicide used for controlling weeds.
10. **BHC** - This is an insecticide, not a herbicide.

**Step 2: List the herbicides identified.**

From the analysis, the substances that are herbicides are:
- Metolachlor
- Simazine
- MCPA
- Butachlor
- 2, 4-D
- Dalapon

**Final Answer: The herbicides among the options are: (ii) Metolachlor, (iii) Simazine, (iv) MCPA, (vii) Butachlor, (viii) 2, 4-D, and (ix) Dalapon.**

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