Antennae of cockroach function as

Options

A. auditory receptor
B. gustatory receptor
C. olfactory receptor
D. tactile sensory receptor

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the function of the antennae in cockroaches. We need to identify what type of receptors the antennae serve as.

2. **Identifying the Options**: The options provided are:
- Auditory receptors
- Gustatory receptors
- Olfactory receptors
- Tactile sensory receptors

3. **Analyzing Each Option**:
- **Auditory Receptors**: These receptors are responsible for detecting sound. They are not related to the function of antennae in cockroaches.
- **Gustatory Receptors**: These receptors are sensitive to chemicals in food and are involved in taste. This is not the primary function of cockroach antennae.
- **Tactile Sensory Receptors**: These receptors are sensitive to touch. While antennae can have some tactile function, it is not their main role in cockroaches.
- **Olfactory Receptors**: These receptors are responsible for detecting smells. Cockroach antennae are primarily involved in sensing odors, which helps them locate food.

4. **Conclusion**: Based on the analysis, the antennae of cockroaches function mainly as **olfactory receptors**. This means they help the cockroach detect smells in their environment, which is crucial for locating food.

### Final Answer:
The antennae of cockroaches function as **olfactory receptors**.

---