Classify these fruits as "citrus" or "non citrus".
Orange; Grapefruit; Apple; Banana
- Orange is a citrus fruit.
- Grapefruit is a citrus fruit.
- Apple is a non-citrus fruit.
- Banana is a non-citrus fruit.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify these fruits as "citrus" or "non citrus".

### Input:
Orange; Grapefruit; Apple; Banana

### Output:
- Orange is a citrus fruit.
- Grapefruit is a citrus fruit.
- Apple is a non-citrus fruit.
- Banana is a non-citrus fruit.