Classify the following objects into their appropriate groups: apple, banana, lettuce, automobile.
Fruits: apple, banana. 

Vegetable: lettuce. 

Vehicle: automobile.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify the following objects into their appropriate groups: apple, banana, lettuce, automobile.

### Output:
Fruits: apple, banana. 

Vegetable: lettuce. 

Vehicle: automobile.