Choose the incorrect pair from the matches given below.

Options

A. Antennae - Sensory receptors
B. Metathoracic wings - Flying
C. Malpighian tubule - Excretion
D. Crop - Food grinding

Explanation

To solve the question of identifying the incorrect pair from the matches given, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Analyze the First Pair: Antennae - Sensory Receptors**
- Antennae in cockroaches serve as sensory receptors. They contain tactile receptors for touch and olfactory receptors for smell. This pair is correct.

2. **Analyze the Second Pair: Metathoracic Wings - Flying**
- The metathoracic wings are indeed used for flying in cockroaches. This pair is also correct.

3. **Analyze the Third Pair: Malpighian Tubules - Excretion**
- Malpighian tubules are the main excretory organs in cockroaches and are responsible for excretion. This pair is correct as well.

4. **Analyze the Fourth Pair: Crop - Food Grinding**
- The crop is primarily involved in the storage and initial digestion of food, not grinding. The grinding of food is performed by the gizzard. Therefore, this pair is incorrect.

### Conclusion:
The incorrect pair is **Crop - Food Grinding**.