Consider the following pairs:
| Generation of Biofuels | Source |
|
1. First-generation Biofuels |
Food sources |
|
2. Second generation Biofuels |
Non-food crops |
|
3. Third generation Biofuels |
Genetically engineered |
|
4. Fourth generation Biofuels |
Micro-organisms |
Which of the pairs given above is/are correctly matched?
1
Only one pair
2
Only two pairs
3
Only three pairs
4
All the four pair