Which one is not a petrocrop?

Options

A. Euphorbia lathyrus
B. Calotrophis procera
C. Jatropha
D. Hardwickia binata

Answer

To determine which option is not a petrocrop, we will analyze each option based on the definition of petrocrops.

### Step-by-Step Solution:

1. **Understand the Definition of Petrocrops**:
- Petrocrops are plants that produce latex containing long-chain hydrocarbons. These hydrocarbons can be converted into biofuels, serving as alternatives to petrol and other fuels.

2. **Evaluate the Options**:
- **Option 1: Euphorbia lathyris**:
- This plant produces latex that can be converted into biofuels. Therefore, it is a petrocrop.
- **Option 2: Calotropis procera**:
- Similar to Euphorbia lathyris, Calotropis procera also produces latex that can be converted into biofuels. Thus, it is also a petrocrop.
- **Option 3: Jatropha**:
- Jatropha seeds produce oil that can be converted into biodiesel. This oil is used as an alternative fuel, making Jatropha a petrocrop as well.
- **Option 4: Hardwickia binata**:
- Hardwickia binata is a deciduous ornamental tree primarily used for decorative purposes. It does not produce latex or hydrocarbons for biofuel production, making it not a petrocrop.

3. **Conclusion**:
- Among the options provided, the plant that is not a petrocrop is **Hardwickia binata**.

### Final Answer:
- The option that is not a petrocrop is **Hardwickia binata**.